| Character | Actor | Description |
| Julie Pierce | Hilary Swank | Protagonist of The Next Karate Kid. Teenage girl who lost her parents, Susan and her unnamed father, now living with her paternal grandmother Louisa Pierce. As she is a frequent victim of bullying, Mr. Miyagi teaches her Karate to defend herself. She helps heal a female Hawk with a broken leg who she names Angel and when Julie goes to the monastery with Mr. Miyagi, she has Eric McGowen, her love interest, look after Angel; when Angel is fully recovered, she and Mr. Miyagi release Angel back into the wild. She attends prom with Eric, and later that night fights Ned, her bully, and manages to defeat him.
Throughout Cobra Kai's run, there was speculation that Swank might reprise the role of Julie. According to Heald, they had a storyline involving Julie related to Mr. Miyagi and the mystery of a stolen necklace for Cobra Kai season 6, "but before we got too deep, we had to reach out to Hilary and find out would she be willing to come and play with us." At the end of the series in 2025, the creators stated that Swank would not appear as, "people have all sorts of reasons why they will or will not be participating in something, and with the timing of whatever was going on, it just was never an option." However, they also indicated that they will "have to see what might happen in this universe if we're fortunate enough to continue writing within it. She's a character that we have a lot of excitement to revisit." |
| Lieutenant Jack Pierce | NA | Julie's late grandfather, husband of Louisa Pierce, father of Julie's unnamed father, and Mr. Miyagi's military commander during World War II; both were in the 442nd Infantry Regiment (United States). Mr. Miyagi eventually taught Jack Pierce Karate as a message of thanks for saving his life. Pierce would eventually teach Karate to his son, who taught it to Julie. |
| Louisa Pierce | Constance Towers | Julie's grandmother, widow of Jack Pierce, mother of Julie's unnamed father. Mr. Miyagi sends her to Los Angeles to his home in order to give him time to bond with Julie, and help her cope with bullying, as well as the loss of her parents. |
| Colonel Dugan | Michael Ironside | Main antagonist of The Next Karate Kid. Leads a JROTC-style program, Alpha Elite, at Julie's school. After losing a fight to Mr. Miyagi, his students quit on him. |
| Eric McGowen | Chris Conrad | New student who joins Alpha Elite to someday be accepted into the Air Force Academy; Julie's love interest. He later quits Alpha Elite, not approving of Col. Dugan's training methods. Eric takes Julie to prom. Later that night he fights Ned, but gets defeated by him, so Julie steps in and manages to defeat Ned. |
| Ned | Michael Cavalieri | Secondary antagonist of The Next Karate Kid. Skilled academy student and gang leader of the Alpha Elite; fought Eric and Julie, with the latter defeating him; he then quits Alpha Elite due to Col. Dugan's abuse and losing his fight to Mr. Miyagi. |
| Charlie | Walton Goggins | Ned's friends; students of the Alpha Elite who later quit due to Col. Dugan's abuse. |
| Gabe | Tom O'Brien | Ned's friends; students of the Alpha Elite who later quit due to Col. Dugan's abuse. |
| Morgan | Thomas Downey | Ned's friends; students of the Alpha Elite who later quit due to Col. Dugan's abuse. |
| Abbot | Arsenio "Sonny" Trinidad | The monks. Abbot is the lead monk of the monastery. They are old friends with Mr. Miyagi. They briefly shun Julie when she tries to kill a cockroach as it goes against their beliefs in killing wildlife, but make amends with her when she gifts them with a praying mantis, and befriend her, and celebrate her birthday. They later visit Julie and Mr. Miyagi at Julie's grandmother's home and when Julie attends prom, Mr. Miyagi and the Monks go bowling where they do zen bowling, impressing the crowd at the bowling alley. |
| Tall Monk | Jim Ishida | The monks. Abbot is the lead monk of the monastery. They are old friends with Mr. Miyagi. They briefly shun Julie when she tries to kill a cockroach as it goes against their beliefs in killing wildlife, but make amends with her when she gifts them with a praying mantis, and befriend her, and celebrate her birthday. They later visit Julie and Mr. Miyagi at Julie's grandmother's home and when Julie attends prom, Mr. Miyagi and the Monks go bowling where they do zen bowling, impressing the crowd at the bowling alley. |
| Monk | Rodney Kageyama | The monks. Abbot is the lead monk of the monastery. They are old friends with Mr. Miyagi. They briefly shun Julie when she tries to kill a cockroach as it goes against their beliefs in killing wildlife, but make amends with her when she gifts them with a praying mantis, and befriend her, and celebrate her birthday. They later visit Julie and Mr. Miyagi at Julie's grandmother's home and when Julie attends prom, Mr. Miyagi and the Monks go bowling where they do zen bowling, impressing the crowd at the bowling alley. |
| Buddhist Monk | Seth Sakai | The monks. Abbot is the lead monk of the monastery. They are old friends with Mr. Miyagi. They briefly shun Julie when she tries to kill a cockroach as it goes against their beliefs in killing wildlife, but make amends with her when she gifts them with a praying mantis, and befriend her, and celebrate her birthday. They later visit Julie and Mr. Miyagi at Julie's grandmother's home and when Julie attends prom, Mr. Miyagi and the Monks go bowling where they do zen bowling, impressing the crowd at the bowling alley. |
| Senator Daniel Inouye | Himself | Made a cameo giving the opening speech at Arlington National Cemetery for a commendation for Japanese-Americans who fought in the 442nd Regimental Combat Team during World War II. |
| Girl At Prom | Julie Weintraub | A girl attending prom who alerts everyone at the prom about the Alpha Elite bungee jumping in the gym. She's portrayed by the daughter of the late producer Jerry Weintraub, who produced The Karate Kid films. |
| Character | Actor | Description |
| Amanda LaRusso | Courtney Henggeler | Daniel's wife and co-owner of LaRusso Auto Group, a chain of car dealerships; Samantha and Anthony's mother. She is Jewish-American. At first, she is happy for Daniel when he re-discovered Karate, but by season 2, starts getting annoyed when he's focusing more on Miyagi-Do then the dealership and after the school brawl, she tells him no more Karate. In season 3, she later changes her mind and allows Daniel to re-open Miyagi-Do in season 3 after Kreese's students attack Sam and break Demetri's arm, and even confronts Kreese herself and slaps him when he attempts to hit on her. In season 4, she tries to help Tory become a better person, especially after learning of her mother's illness and gets Tory a therapist, which Tory appreciates. In season 5, Terry Silver, acting nice in front of Amanda, succusfully puts a strain on Daniel and Amanda's marriage making Amanda leave Daniel temporary going back home to her mother in Ohio and taking Samantha and Anthony with her; it is then revealed when back home she is the maternal cousin of Jessica Andrews, who set Amanda up with Daniel; Amanda lets out her frustrations about Daniel's rivalries to Jessica, but when Amanda mentions Terry, Jessica is shocked by Terry's return and tells Amanda how horrible Terry truly is and after hearing this, Amanda returns home to Daniel and is now officially on Daniel's side and supports him in his battle against Cobra Kai. In season 6, during Sam and Tory's fight for Captain of Sekai Saikai, she receives a phone call informing her on Tory's mother's death and tells Daniel to stop the fight because Tory's not in her right headspace; later, she hosts a pizza party at her home for the Miyagi-Do students who are not competing in the Sekai Taikai to watch the event live, but everybody is horrified when the all dojo-brawl breaks out and are saddened by Kwon's death; in the series finale, she and her family are at the airport saying goodbye to Samantha who is off to Okinawa for a student programme. |
| Miguel Diaz | Xolo Maridueña | The main protagonist of Cobra Kai. He is a 17-year-old Ecuadorian American teenager with asthma who, after an encounter with some bullies at the start of the series, becomes the first student in Johnny's Cobra Kai dojo; he later begins an on-off relationship with Samantha LaRusso, but as a result forms a rivalry with Robby Keene, Daniel's top Miyagi-Do student and Johnny's estranged son; Sam later breaks up with him when Miguel accuses her of cheating on him with Robby and when trying to fight Robby, he accidentally hits Sam, making her end the relationship; he wins the 50th All-Valley tournament in the season 1 finale against Robby. In season 2, after his first break up with Sam despite making several attempts to win Sam back which she always shuts down and Sam starts dating Robby, he starts a new relationship by dating Tory Nichols despite still having feelings for Sam; after Miguel discovers Hawk stole Mr. Miyagi's medal of honour, he fights Hawk, wins the fight against Hawk, gets the medal away from him and returns it to the LaRussos, but gives it to Robby who is living with the LaRussos when Robby answered the door instead and during a party at Moon's, Sam gets drunk and learns from Aisha that Miguel returned the medal which Robby never told Sam about, resulting in a drunk Sam to kiss Miguel which was witnessed by an angry Tory; Miguel is secretly happy the kiss happened, but at the same is conflicted and gently tells Sam he can't get back with her as he's with Tory; in the season 2 finale, after Tory starts the school brawl, Miguel tries to stop Tory from hurting Sam, but also fights Robby and the brawl ends when he suffers a severe spine injury during the school brawl by Robby and ends up in a coma for a short time. In season 3 he breaks up with Tory, relearns to walk with Johnny's help and eventually leaves the Cobra Kai dojo after it is taken over by John Kreese and joins Eagle Fang Karate, Johnny's new dojo and reconciles with Sam and resume their relationship after Robby breaks up with her. In season 4, he trains under both, Daniel and Johnny, and participates in the 51th All-Valley tournament, having to pull out in the semi-finals. In season 5, he travels to Mexico to find his father, Hector, but after learning his mom spoke the truth about Hector and how bad of a man he really was, he leaves Mexico and Johnny takes him back home when he traveled to Mexico to find Miguel; he also reconciles with Robby after Johnny makes them fight to help them get over their differences. In season 6, he loses the match for Miyagi-Do's male captain at the Sekai Taikai against Robby; later, he and Robby become stepbrothers after Johnny and Carmen marry, with Johnny becoming Miguel's stepfather and later that same day, Miguel's younger maternal half-sister, Laura, is born; after a series of events, Miguel returns to Cobra Kai under Johnny's leadership and wins the Sekai Taikai against Axel Kovačević; in the end of the series, Miguel decides to spend a few weeks with Sam in Okinawa before heading to Stanford university to start college. |
| Samantha “Sam” LaRusso | Mary Mouser; Reese TinLee | Daniel and Amanda's teenage daughter who was taught karate by her father at a young age, and had a close relationship with Mr. Miyagi growing up and referred to him as grandfather. In season 1, Samantha has a relationship with Kyler Park, but breaks up with him after he tries to sexually assault her in the movie theater, and he in return spreads lies about Samantha around the school and turns her friends against her, but Miguel Diaz, one of Kyler's victims to bullying, knows Kyler made up those lies about Sam and beats up Kyler and his friends, impressing Sam and later starts dating Miguel as a result, but breaks up with Miguel at the end of the season after he accidentally hit her when he thought she was cheating on him with Robby Keene when Miguel was trying to hit Robby instead. She starts a relationship with Robby Keene in season 2 and makes an enemy, Tory Nichols, who joins Cobra Kai and Miguel starts dating Tory after Sam kept shutting down all of Miguel's attempts to get back together; after getting drunk at Moon's party and found out Miguel returned Mr. Miyagi's medal of honor which Hawk stole, she kisses Miguel, which was witnessed by an angry Tory and results in the school brawl in the season 2 finale, ending with Robby knocking Miguel over the railing, resulting in Miguel going into a coma. In season 3, she is suspended after the school brawl for two weeks, then decides to restart Miyagi-Do, despite dealing with post-traumatic stress disorder; she also gets back together with Miguel after Robby catches them and mistakenly thought they were flirting, causing Robby to end his relationship with Sam. In Season 4, she trains under both Daniel and Johnny and though she is hesitate to learn Johnny's lessons at first such as jumping across on top of another building, she finally gives in after Johnny scolds her and the Miyagi-Do students for failing his lessons and when she successfully jumps to the other building, Johnny becomes proud of her and they form a close friendship afterwards; later, despite Daniel and Johnny's alliance ending due to a disagreement, Johnny still allows Sam to train with him, while also still training with her father, something Johnny is aware of, but not Daniel; she later loses the All-Valley tournament against her rival Tory in the season finale, with both her father and Johnny who made amends at the Tournament comforting her with Johnny assuring her she did a good job. In season 5, Sam experiences an identity crisis after losing and breaks up with Miguel, but gets back together with him in the season 5 finale. In season 6, she makes up with Tory, becoming friends and becomes Miyagi-Do's female Captain at the Sekai Taikai, but decides not to fight in the semi-finales after Axel injuries Robby's leg, something which Daniel and Johnny respect; in the series finale, Lucille, her paternal grandmother, gives her a necklace that once belonged to Mr. Miyagi's mother and then his wife; when Mr. Miyagi was dying, he gave the necklace to Lucille to give to Sam in the future when the time was right, and Lucille gives it to her as a graduation gift; she later says goodbye to her family and leaves the valley and starts a student programme in Okinawa, with Miguel deciding to spend a few weeks with her in Okinawa before he heads to Stanford university to start college |
| Anthony LaRusso | Griffin Santopietro | Daniel and Amanda's son and Samantha's younger brother. In season 1, he is spoiled and bratty and is rude to Johnny, who returns the favour back at him. In season 2, he is sent to summer camp where he becomes more active. In season 4, he is no longer bratty; he is peer pressured into bullying new student Kenny Payne; also, Daniel reveals to him when he was born, he tells Anthony that he was the only person to successfully land a kick on Mr. Miyagi when Mr. Miyagi held him as a baby, but Mr. Miyagi laughed it off and said Anthony was a kicker, which Anthony found amusing; later, after Daniel and Amanda find out he was bullying Kenny and was suspended, he was grounded and after Daniel catches him using an iPad, Daniel angrily breaks it in half, giving Anthony a wake up call and becomes better behaved after this. In season 5, he starts taking up Karate at Miyagi-Do to defend himself after Kenny, who joined Cobra Kai, starts bulling Anthony in return; he also forms a close relationship with his older sister; he later was the one to expose Terry Silver for bribing the tournament referee in Cobra Kai's favor by uploading the video which Demetri and Hawk started uploading originally before the Cobra Kai's attacked them. In season 6, he makes amends with Kenny, and they become friends; he also starts training with Johnny at Cobra Kai after Johnny gets Cobra Kai back from Kreese and Johnny tells Daniel his son has really improved in Karate, implying Johnny and Anthony are on good terms; he also says goodbye to Samantha at the airport and hugs her when she heads off to Okinawa for a student programme. |
| Louie LaRusso Jr | Bret Ernst | Daniel's cousin, son of Louie LaRusso Sr. and older brother of Vanessa LaRusso; works at LaRusso Auto and is close friends with fellow employee Anoush; torched Johnny's car with his biker buddies in revenge for defacing Daniel's billboard and disrespecting the family. In season 5, Louie and Johnny become civil and put the past behind them when Louie offers to take care of Johnny, Carmen, Daniel, Amanda and Chozen's night out for fun which Johnny agrees under the condition there is dancing as Carmen loves to dance, and Louie arranges it for everybody to head to a dance club; later, at the dance club, he angrily attacks Anoush after discovering he is dating his sister Vanessa, something that amuses Daniel and Johnny, but a short time later, Louie and Anoush make amends. |
| Anoush Norouzi | Dan Ahdoot | Is an employee at LaRusso Auto. Is close friends with Louie. In season 2, when he refuses to tell Johnny where Robby was currently living, Johnny angrily attacks him and Anoush confesses Roby is living with the LaRusso's; he later quits LaRusso Auto to work for Tom Cole, a rival dealership, when Daniel fails to show up to a meeting there were supposed to have. In season 3, he quits working for Tom Cole when Tom tries to buy out LaRusso Auto after the school fight and he is re-hired at LaRusso Auto after Daniel's friends from Okinawa, Kumiko and Yuna, save the business. In season 5, he enters a relationship with Louie's sister and Daniel's cousin, Vanessa LaRusso, something that angered Louie at first and attacked Anoush, but later that night make amends. |
| Carmen Diaz | Vanessa Rubio | Miguel's mother and Hector's ex-wife; dated a man named Graham, who did not have good intentions with her; later on she starts a relationship with Johnny in season 2 and becomes good friends with Daniel and Amanda; after the school brawl and Miguel ends up in a coma, she angrily tells Johnny to stay out of her life. In season 3, she makes amends with Johnny when Johnny helps Miguel to walk again and resume their relationship. In season 4, after Miguel heads off to Mexico to find his father, she is upset and reveals to Johnny that Miguel's father does not know who his own son is; in season 5, Johnny and Robby go to Mexico and manage to bring Miguel back safely; shortly after Miguel returns home, she finds out she's pregnant with Johnny's baby. In season 6, she and Johnny get married at the hospital, which is officiated by Johnny's high school friend Bobby Brown, and she becomes Robby's stepmother and later that same day, their daughter is born, who they name Laura after Johnny's late mother. |
| Rosa Diaz | Rose Bianco | Miguel and Laura's maternal grandmother and Carmen's mother; later becomes Johnny's mother-in-law and Robby's step grandmother. She likes Johnny and openly despises her ex son-in-law, Hector. She becomes good friends with Daniel and Amanda and also befriends Daniel's mother, Lucille. She likes to smoke marijuana. |
| Robert Swayze "Robby" Keene | Tanner Buchanan | Johnny's estranged teenage son and son of Shannon Kenne, who loves her son, but is an alcoholic; he becomes Daniel's first and top student in Miyagi-Do, thus forming a rivalry with Miguel Diaz, Johnny's top Cobra Kai student. Robby drops out of school and starts working for Daniel at LaRusso Auto and also starts learning Karate; after Daniel learns Robby is Johnny's son, Daniel banishes him from Miyagi-Do, so Robby enters the 50th All-Valley tournament without a dojo or Sensei; after Hawk injuries Robby, which upsets Johnny and scolds Hawk for doing such a thing, Robby makes amends with Daniel after Daniel offers to be his Sensei for Miyagi-Do, which Robby accepts, he heals in time for the final match fights against Miguel, but loses in the season 1 finale. In season 2, after Shannon abandons him for a trip to Mexico, resulting in the rent falling behind and the power to his apartment shut off, Daniel and Sam discover his living conditions and he and Amanda let Robby move in with them; he also starts a relationship with Samantha LaRusso, and later Shannon shows up to The LaRusso's, full with regret and tells Robby she is getting help by going to rehab and promises to become a better mother; later, after Sam kisses Miguel while drunk at Moon's party, Robby was going to take Sam home, but Sam begs him to take her somewhere else, so he takes her to Johnny's apartment, which Daniel discovers the next day and angrily drops Robby as a Miyagi-Do student; the next day, during the school brawl, he learns Sam cheated, but decides to stop Tory from hurting Sam until Miguel attacks Robby, resulting in them fighting; the brawl ends when he accidentally cripples Miguel at the end of the school brawl; as consequence, he is expelled from West Valley High school but is allowed to return to the school in season six. After a series of misunderstandings and his time in juvie in season 3, he betrays Miyagi-Do and joins Cobra Kai and permanently ends his relationship with Sam when he attempted to reconcile with her, only to see her flirting with Miguel. He becomes its new top student in season 4 and starts to train Kenny Payne, but loses the 51th All-Valley finale against Hawk; he also begins an on-off relationship with former rival-turned-friend, Tory Nichols. Robby eventually sees the error of his ways and rejoins Miyagi-Do in season 5, and in the process makes amends with his father, Daniel, Samantha, Miguel, and Hawk. In season 6, he becomes Myagi-Do's Co-Captain for the Sekai Taikai, after beating Miguel in a deciding match; he and Miguel become stepbrothers after Johnny and Carmen marry, with Robby becoming Carmen's stepson and later that same day, Robby's younger paternal half-sister, Laura, is born; at the Sekai Taikai, he gets injured during the semi-finals by Axel Kovačević and decides to no longer fight, with Miguel taking his place who manages to defeat Axel; in the series finale, Robby and Tory get a job offer to promote Karate, which they accept. |
| Shannon Keene | Diora Baird | Johnny's ex-girlfriend and Robby's mother, an alcoholic. She despises Johnny for abandoning her and Robby from Day 1 when she went into labor with Robby, not aware that his mother's recent death who died a few days before her grandson's birth has messed up Johnny emotionally. Though she loves Robby, she frequently leaves him alone to fend for himself while she goes out for dates and drinks. In season 2, after going to Mexico, she realizes she's been failing Robby and with Daniel and Amanda's help, who she becomes good friends with, makes the decision to get help and goes into rehab; she has been sober since. In season 5, she makes peace with Johnny and they become civil and is happy Johnny is slowly changing his life around for the better and allows Robby to stay with his dad. In season 6, she ends up in a relationship with a man named Jace, a friendly man who is very caring and willing to help Robby with his future career; later, she is upset when Axel injuries Robby's leg and along with Johnny, they comfort Robby where they both tell their son they love him and will always be proud of him. |
| Sid Weinberg | Ed Asner; Michael H. Cole | Johnny Lawrence's abusive stepfather and a retired film producer. He gives Johnny a check as a way to break off the relationship, which Johnny later uses to fund Cobra Kai; later, after Cobra Kai becomes a success, he returns the money to Sid telling Sid he never needed his money. In season 3, Sid refuses to help pay for Miguel's surgery to walk again, so Johnny steals an expensive sculpture while leaving Sid's home which Johnny pawns and pays for the surgery. In season 6, Johnny receives his late mother's wedding ring from Sid so Johnny can marry Carmen and Johnny admits that Sid is getting soft in his old age. Asner died in 2021 before the completion of the series. |
| Laura Lawrence | Candace Moon | Johnny Lawrence's mother and Robby's grandmother. Died in 2002, mere days before Robby's birth. Her death greatly affects Johnny - making him feel even more alienated and depressed, which worsened his drinking and reckless behaviors. |
| Eli "Hawk" Moskowitz | Jacob Bertrand | Demetri's best friend and one of Miguel's high school friends. He is often bullied for his cleft lip which leads to him joining Cobra Kai, where he takes on the moniker of Hawk and develops a more aggressive personality. While he originally joined Cobra Kai to gain some confidence and stand up to his bullies, he gets easily influenced by John Kreese's "No Mercy" lifestyle, that it leads to him becoming an even worse bully and a major antagonist in seasons 2 and 3, including stealing Mr. Miyagi's medal of honor, which angers his close friend and fellow Cobra Kai student Miguel Diaz and when Hawk refuses to return the medal, Miguel fights Hawk, gets the medal away from him and Miguel returns the medal back to The LaRusso's; Hawk also ends up in a relationship with Moon, but she breaks up with him after learning he beat up Demetri; Hawk makes several attempts to win Moon back, including flirting with a girl named Piper Elswith to make Moon jealous, only to discover Piper is a lesbian and Moon, who is bisexual, are in a relationship together; despite making more attempts to win Moon back, including winking at her on the soccer course, she simply ignores him; he eventually realizes just how far he has fallen and switches sides to Miyagi-Do and Eagle Fang in the season 3 finale, making amends with his friend Demetri and everyone else he hurt. In season 4, after the Cobra Kai's shave his mohawk off as revenge for betraying them, Hawk briefly quits Karate, but with Demetri's encouragement, Hawk eventually goes back, but joins Miyagi-Do instead of Johnny's Eagle Fang and tells Daniel he doesn't mind being called either Eli or Hawk and he gets back together with Moon, and in the 51st All Valley Karate Tournament, wins the tournament for the boys division. In season 6, he re-grows his mohawk; his friendship with Demetri briefly becomes strained once more when Hawk didn't apply to MIT, but at Sekai Taikai, eventually make amends and in the series finale, he, along with Demetri, goes to Caltech after Demetri turns down MIT. |
| Aisha Robinson | Nichole Brown | Samantha LaRusso's best childhood friend, who is bullied by high school classmates. She becomes the first student after Miguel to join Cobra Kai and also the very first female student to officially join Cobra Kai ever since the dojo was first founded by Kreese and Silver in the 1970s, and she befriends Miguel. Briefly shuns Samantha when Samantha doesn't defend her from the bullies, but they eventually make amends. She becomes friends with one of her former bullies, Moon Taylor, who saw the errors of her ways and she apologized to Aisha who accepted, but also gets revenge on another one of her bullies, Yasmine, by giving her a front wedgie when Yasmine refuses to apologize at Moon's suggestion, humiliating her in front of everyone. In season 2, she befriends new student, Tory Nichols, the only other female student to be in Cobra Kai at the time; she later tells Samantha that Miguel returned Mr. Miyagi's medal of honour, something Samantha didn't know; after the school fight breaks out, she tries to stop Tory from attacking Samantha, but when a boy who isn't part of either dojo hits her, Aisha angrily punches him in retaliation and becomes part of the school fight; she later transfers out of the high school after the school brawl. She later returns in season 4 when Sam surprises her with a visit to her new home Santa Barbara; Aisha gives Sam advice on trying to make amends with Tory. |
| Demetri Alexopoulos | Gianni Decenzo | An intelligent, nerdy, and socially awkward outcast who is Hawk's childhood best friend and a member of Miguel's high school friend group. After Hawk starts dating Moon, Demetri becomes friends with Moon; he goes on to join Miyagi-Do in season 2, after Hawk's violent personality change causes a massive drift between the two, and after Moon learns Hawk attacked Demetri, Moon breaks up with Hawk. While originally a big whiner, he gains confidence throughout his time in Miyagi-Do and even gets together with Yasmine, the girl of his dreams, in season 3, who previously bullied Demetri, but after Kyler humiliated Demetri in front of the school by drawing a giant penis on Demetri's arm cast, Yasmine signs his arm cast and counter-graffiti's it; one time, Samantha and Miguel caught Demetri and Yasmine making out and both embarrassed they were caught, quickly deny to Sam and Miguel they are in a relationship, much to Sam and Miguel's amusement. Although he is not the strongest fighter among the new generation of karate students, his fighting skills have greatly improved throughout the series to the point where he makes it to the top four at the 51st All-Valley Karate Tournament in the season 4 finale. In season 6, he is accepted into MIT, but turns down the offer to join Hawk at Caltech; at Sekai Taikai, Yasmine breaks up with him after Hawk unintentionally showed Yasmine and Moon Demetri dancing with another girl, Maria from Spanish dojo Furia de Pantera via Zoom, but Yasmine later forgives him when he makes it up to her. |
| Isaiah Robinson | Chris Mason | Aisha's father and Sandra's husband. Is a former football player who played for the Los Angeles Chargers and is good friends with Daniel and Amanda. |
| Bert | Owen Morgan | A diminutive junior student of Cobra Kai who is later kicked out by John Kreese in season 3, which leads to him joining Eagle Fang Karate. He never scored any points in any of the Karate Tournaments he competed in due to always fighting people who were much taller than him. He is close friends with Nate. |
| Kyler Park | Joe Seo | The main antagonist of season 1, a major antagonist in seasons 3–5, and a minor protagonist in season 6. He is a high school bully who frequently bullies Miguel, Demetri and Hawk and comes from a wealthy Korean American family who is Sam's first boyfriend in the series. He officially joins Cobra Kai in season 3 after it is taken over by John Kreese, becoming an even bigger bully and remains loyal to the dojo until the season 5 finale. In season 6, he is seen attending college and has become a better person and much more friendly, and makes amends with Miguel, becoming friends after Miguel helps Kyler take down Zenker, president of the fraternity who put Kyler through a cruel hazing. After humiliating Zenker and his frat brothers, he was given a free pass to join a rival Fraternity, no strings attached. |
| Brucks | Bo Mitchell | A high school bully and friend of Kyler. In season 3, he attempts to join Cobra Kai, but Hawk, one of his former victims of bullying, very aggressively beats him up so badly, he's bleeding and crying in pain, resulting in him never trying to join a Karate dojo again. He later reappears in season 6, all healed and attending college, he is now friendly and forgives Hawk. |
| Moon Taylor | Hannah Kepple | One of Sam's friends and Hawk's girlfriend at West Valley High. Originally a bully, she sees the errors of her ways and apologizes to those she bullied, including Aisha Robinson who accepts Moon's apology and become friends. She is a bisexual pacifist who does not condone violence, and even attempts to ease the tension between the Cobra Kai and Miyagi-Do students in season 2, to no avail, and during the school fight after begging everyone to stop, she flees in terror after two students fighting nearly collide into her. Her and Hawk originally got together near the end of season 1, before breaking up halfway through season 2. She later gets a girlfriend named Piper by the end of season 2, before ultimately getting back together with a reformed Hawk in season 4. In season 3, she and the cheerleading squad help Sam and the Miyagi-Do students with a car cash to raise money for Miguel's surgery for him to walk again. She is the daughter of Winnie Taylor and has an older sister named Sage. |
| Yasmine | Annalisa Cochrane | One of Sam's friends and Moon's best friend. She is the leader of the rich girl clique at West Valley High, and is very antagonistic towards the protagonists throughout all of season 1. However, after getting humiliated by Aisha and developing romantic feelings for Demetri, she becomes a better person, and even counter-graffiti's Demetri's arm cast after Kyler drew a penis on it; she and Demetri are later caught by Samantha and Miguel making out and both embarrassed they were caught, quickly deny to Sam and Miguel they are in a relationship, much to Sam and Miguel's amusement. While she isn't officially a member of any dojo, she still supports Miyagi-Do as it is the dojo her boyfriend Demetri is in. Though, her and Demetri eventually break up in season 6. In the series finale, Demetri and Yasmine reconcile their relationship before Demetri leaves for college. |
| Rory | Dawson Towery | Friends of Kyler and Brucks who beat up and bully Miguel, Hawk, and Demetri. After Miguel gets revenge beating them up along with Kyler and Brucks, Rory and A.J. aren't seen again. |
| A.J. | Jonathan Mercedes | Friends of Kyler and Brucks who beat up and bully Miguel, Hawk, and Demetri. After Miguel gets revenge beating them up along with Kyler and Brucks, Rory and A.J. aren't seen again. |
| Lynn | Susan Gallagher | Homeless woman who hangs around the strip mall. She frequently enjoys hassling Johnny. |
| Sheila | Kwajalyn Brown | An employee at LaRusso Auto. In season 4, she is revealed to have a young daughter named Cindee that Samantha used to babysit for; Sheila, Cindee, The LaRusso family and Miguel are at a birthday party place for Cindee's birthday while Tory is working there as an entertainer. |
| Tom Cole | David Shatraw | Owner of Cole's Autos on Van Nuys, a rival automotive dealership. In season 1, after Johnny vandalizes Daniel's billboard with a penis, Tom orders LaRusso Auto staff sausages for lunch, angering Daniel and he confronts Tom, even kicking his bobo drink out of his hands, stunning Tom and his staff. In season 2, though offscreen, a few LaRusso Auto staff quit to work for Tom, including Anoush. In season 3, following the school brawl, he tries to buy out LaRusso Auto which is failing, but Anoush turns on Tom and says Daniel and Amanda would never sell the business, quits working for Tom and he is re-hired by the LaRusso's; eventually, Daniel's friends from Okinawa, Kumiko and Yuna, save LaRusso Auto. Tom has not been seen since LaRusso Auto was saved. |
| Rhonda | Carole Kaboya | Sid's caregiver, who is a target of Sid's verbal abuse. |
| Lyle | Matt Borlenghi | Owner of the Pawn Shop at the strip mall. Gets very easily annoyed with Johnny whenever Johnny visits his store. In season 6, his opinion on Johnny softens and cheers for Johnny while watching the Sekai Taikai at a bar. |
| Nestor | Vas Sanchez | The owner of the convenience store at the strip mall. Is very friendly to his customers unless they annoy him. He cheers for Johnny while watching the Sekai Taikai at a bar. |
| Armand Zarkarian | Ken Davitian | Armenian American real estate tycoon. Daniel trying to shut down Cobra Kai, convinces him to raise the rent, which he does, but it also results in the rent being raised for the other businesses at the strip mall as well, including Lyle's Pawn shop and Nestor's convenience store. In season 2, when Kreese steals Cobra Kai from Johnny, Kreese tells Johnny that Armand never liked Johnny. In season 3, after Amanda learns how truly horrible Cobra Kai is, she and Daniel get Armand to kick Kreese out, but Kreese beats him up and Armand backs out of Daniel and Amanda's deal and this is Armand's final appearance. In season 6, Daniel makes a deal with Armand to get the dojo back for Johnny, making Johnny grateful. |
| Roland Zakarian | Alex Huff | Armand's son. |
| Cruz and Trey | Jeff Kaplan & Terayle Hill | Robby's former friends who spend their time committing petty theft; both were sent to jail by the start of Season 3. |
| Daryl | Keith Arthur Bolden | African American member of the All Valley Committee; announcer for the 2018 and 2019 All Valley Under-18 Karate Championships. In season 6, he had a brief rivalry with Gunther over who would be master of ceremonies at the Sekai Taikai being held at All Valley Sports Arena, with Gunther winning the rights to announce after he knocked Daryl down with a single kick; he and Gunther later make peace when the final match takes place between Johnny and Wolf and Gunther lets Daryl announce the final round. |
| Ron | Matt Lewis | President of the All Valley Committee; invites pop star Carrie Underwood as a guest performer for the All-Valley tournament before the qualifying matches. He leaves the committee after season 4 and isn't seen again. |
| Sue | Cara AnnMarie | Only female member of the All Valley Committee; she has a small rivalry with George who thinks he's sexist. |
| George | Kurt Yue | Asian American member of the All Valley Committee; close friend of Daniel and has a small rivalry with Sue who thinks he's sexist. |
| Xander Stone | Tallinn Chat | Represents Topanga Karate; 2017 All Valley Under-18 Karate Champion. |
| Patricia Stone | Suehyla El-Attar | Xander's mother. |
| Mrs. Jenkins | Linda Boston | Vice-Principal of North Hills High School. |
| Mr. Palmer | Dustin Lewis | Science teacher at West Valley High School. In season 2, after witnessing a fellow teacher attempting to stop the school fight gets flipped over by Cobra Kai student Doug Rickenberger, he refuses to get involved and flees the scene. |
| Counselor Blatt | Erin Bradley Dangar | A counselor at West Valley High School, and former high school classmate of Daniel. She is Susan's younger sister. |
| Judy | Kylie Delre | A rich woman who causes Johnny to lose his job after an argument. They later meet accidentally through a dating app. |
| Gregory Schwarber | NA | Ali's husband who she has two children with named Lucas and Ava; Daniel shows a photo of Gregory to Johnny from Ali's Facebook. In season 3, Ali tells Johnny and Daniel she and Gregory are getting divorced and she has gone back to her maiden name. |
| Edwin | A.J. Hicks | Cobra Kai student. He permanently quits Cobra Kai after Terry Silver's cheating is exposed and joins Miyagi-Do in season 6. |
| Abe | Jayden Rivers | Cobra Kai students who later defected to Miyagi-Do karate. Abe remains at Miyagi-Do for the remainder of the series run while Frank quits Karate in season 5. |
| Frank | Cameron Markeles | Cobra Kai students who later defected to Miyagi-Do karate. Abe remains at Miyagi-Do for the remainder of the series run while Frank quits Karate in season 5. |
| Character | Actor | Description |
| Tory Nichols | Peyton List | A troublemaker from a poor family who joins Cobra Kai and becomes its top female fighter, earning her the nickname "Queen Cobra". She is in a relationship with Miguel Diaz during season 2 and starts the school fight in the season finale to get revenge on Samantha LaRusso after witnessing her kissing Miguel. In season 3, she gets expelled because of her actions and was forced out of Cobra Kai; she had to work two jobs to support her family as her mother was ill and also got harassed by her landlord, but Kreese took care of him and she rejoins Cobra Kai and also continues fighting Sam; she and Miguel then break up after Miguel says she needs help, which she mistook for him calling her crazy. In season 4, she starts an on-off relationship with former rival-turned-friend, Robby Keene, and returns to school with the help of Amanda LaRusso and also gets Tory a family therapist after discovering her mother's health, something Tory is grateful for; at the end of season 4, she wins the All-Valley tournament against Sam. In season 5, after finding out that Terry Silver cheated to get the win, she remains with Cobra Kai, not trusting Terry anymore, but she stayed at the dojo as she was secretly working with John Kreese to get revenge on Silver with the latter being framed for beating up Stingray when in truth it was Silver who beat him up resulting in Kreese being sent to prison, but after a plan to expose Terry went wrong that resulted in Daniel LaRusso getting beaten up by Terry Silver, Tory feels guilty; later, when Kreese changes plans and decides to no longer go after Terry, Tory, feeling betrayed, storms off and refuses to associate with Kreese any longer; she then confesses to Samantha, as well as Robby and Miguel that the Tournament was rigged; she also makes a new enemy, Kim Da-Eun, a Sensei from South Korea who Terry hired to help him expande the growth of Cobra Kai; eventually, after fighting Kim Da-Eun with both Sam and Devon's help and Terry finally being exposed, she defects from Cobra Kai in the season 5 finale and officially joins the Miyagi-Fang alliance at the start of season 6, making up with Sam in the process. After the death of her mother she later leaves them, and rejoins John Kreese and Kim Da-Eun's newly established Cobra Kai dojo in South Korea, shocking Daniel, Johnny, Sam and a heartbroken Robby after seeing her in the Cobra Kai gi; she wins the Sakai Taikai against Zara Malik in the finale and ends up becoming a karate influencer and competitor together with Robby. Her character has evolved from being a merciless antagonist to a more sympathetic anti-hero and then a kindhearted hero.. |
| Raymond "Stingray" Porter | Paul Walter Hauser | A Cobra Kai student, a manchild and a member of Hawk's gang. Is put on probation, but later is able to return when Terry coerces him into a deal by framing Kreese. Stingray later regrets his actions and confesses the truth. He later opens up a Cobra Kai dojo training pre-high school students. |
| Chris | Khalil Everage | One of the Cobra Kai students, but then leaves to join Miyagi-Do. Is close friends with Mitch. |
| Mitch | Aedin Mincks | One of the Cobra Kai students, but gets kicked out by Kreese despite Hawk's protests and then joins Eagle Fang, but at some point in season 5, he became an undercover spy for Cobra Kai and then reveals his truth colours that he was with them revealing their secrets to Cobra Kai, shocking the Eagle Fang and Miyagi-Do students, as well as Robby and Tory who no longer trusted Cobra Kai. In season 6, he later joins Miyagi-Do after learning Cobra Kai's cheating, with his friends not trusting him and refuse to let him join, but after he reveals he's wearing a Miyagi-Do shirt, they accept him. Is close friends with Chris. |
| Nate | Nathaniel Oh | Originally a Cobra Kai student, but then leaves to join Miyagi-Do! He is close friends with Bert. |
| Rick | Matt Mangum | A boyfriend of Shannon's that she goes to Mexico with, resulting in the rent to her apartment falling behind. |
| Sunny Mitchell | Kathleen Hogan | Host of the annual Valley Fest. |
| Sandra Robinson | Kim Fields | Aisha's mother and wife of Isaiah; boasts about how Cobra Kai changed her daughter's life for the better. |
| Fisherman | Jesse Santoyo | A fisherman who is fishing on the beach Daniel has an interaction with. After Daniel tells the fisherman he failed to get new students for Miyagi-Do, the fisherman gives Daniel some friendly advice to wait for the people who need him and he might get more students. |
| Derek | JC Leuyer | A criminal companion of Trey and Cruz's. They all get defeated by Daniel in a fight for stealing from the Country Club and all three are arrested. |
| Mrs. Moskowitz | Caroline Avery Granger | Seen in a flashback where she urges West Valley High over the phone to do something about the cyberbullying inflicted on her son, Eli, about his facial deformity. |
| Rico | N/A | Tattoo artist who gives Hawk a tattoo of a hawk on his back. |
| Big Red | Christopher Ryan Lewis | Cobra Kai student; Lil Red's older brother. He permanently quits Cobra Kai after Terry Silver's cheating is exposed and joins Miyagi-Do in season 6. |
| Lil Red | Shane Donovan Lewis | Cobra Kai student, then joins Miyagi-Do; Big Red's younger brother. |
| Mikey Miller | Chris Schmidt Jr. | One of the Cobra Kai students and the second-in-command of Hawk's gang; supporting antagonist in Seasons 2 and 3; quits Cobra Kai. |
| Doug Rickenberger | John Cihangir | One of the Cobra Kai students and member of Hawk's gang; supporting antagonist in Seasons 2 and 3; quits Cobra Kai. |
| Graham | Alex Collins | English man who dates Carmen. After he ghosts Carmen and badmouthes her, Johnny beats him up. |
| Piper Elswith | Selah Austria | Moon's ex-girlfriend; joins Cobra Kai along with her gymnastic teammates in season 4. She later participates in the 51st All-Valley Karate Tournament, but is defeated by Sam in the quarter-finals; the 51st Tournament is the last time she's seen onscreen. In season 5, still a part of Cobra Kai, though offscreen, she was at the Waterpark where she films and posts a video on Instagram of Kenny and Kyler kicking Anthony in the pool, something Samantha discovers and confronts Anthony about it. She isn't mentioned again after this and seemingly quits Cobra Kai before Terry Silver's cheating was exposed, or was possibly on vacation and only heard about the cheating while on vacation which lead her to quit along with everyone else. |
| Ear Gauge | Scott Hamm | A man at a bar harassing a waitress; he then insults Tommy, Johnny's friend and a former Cobra Kai student, angering Johnny and Tommy, and they, along with Bobby and Jimmy fight and defeat the guy and his gang. |
| Waitress | Ahsia Pettigrew | A bar waitress being harassed by a man; Johnny and his buddies, former Cobra Kai gang Tommy, Bobby and Jimmy fight the man and his gang and the waitress assists Johnny by giving him a glass to smash over the man's head. |
| Claire | Shakirah DeMesier | Thee women Johnny has individual dates with he picked from his dating app respectively, but Johnny's outdated phrases and comments turn them off. |
| Veronica | Sarah Grace Sanders | Thee women Johnny has individual dates with he picked from his dating app respectively, but Johnny's outdated phrases and comments turn them off. |
| Ashley | Amor Owens | Thee women Johnny has individual dates with he picked from his dating app respectively, but Johnny's outdated phrases and comments turn them off. |
| Melissa | Gena Shaw | Woman who hits on Johnny at the bar; later spends time drinking with Johnny; Johnny then departs to find Carmen. |
| Cutter | Stephan Jones | Construction worker who loans Johnny his cement mixer truck for the Cobra Kai students to manually rotate the drum as part of their strength training. |
| Fawn | K.D. O'Hair | Stingray's girlfriend whom he brings with her to Moon's party. Fawn shows discomfort upon learning Moon, The Miyagi-Do students and Cobra Kai students are teenagers and not adults. |
| Alice | Natasha Tina Liu | The school announcer who is reading the morning announcements until Tory walks in and snatches the school PA system from her, with Tory saying she is coming for Samantha, which leads to the school fight. |
| Principal Lopez | Jose Miguel Vasquez | The principal of West Valley High. He is horrified when the school fight breaks out, and shows complete disgust when Stingray who was attempting to apply for a job at the school also joins in on the fight. In Season 3, he, Counselor Blatt and the school board hold a night school meeting with angry parents in attendance with Lopez saying there will be no more school fights. |
| Character | Actor | Description |
| Kenny Payne | Dallas Dupree Young | Younger brother of Shawn Payne and the son of a U.S. Army soldier; joins Cobra Kai in an attempt to fight back against his bullies, initially as Robby's protege; in Season 5, he becomes one of the top students behind Tory in Silver's Cobra Kai. He permanently quits Cobra Kai after Terry Silver's cheating is exposed and joins Miyagi-Do in season 6. However, after Devon put laxatives in his water bottle so she can win a spot in Sekai Taikai, he briefly quits Miyagi-Do due to humiliation, thinking Anthony did it, but after Devon confesses the truth, he makes amends with Anthony becoming friends, forgives Devon and goes to Sekai Taikai taking Devon's spot. |
| Devon Lee | Oona O'Brien | Student and member of the debate team at West Valley High School who joins Eagle Fang; later joins Topanga after the former shuts down. She then joins Cobra Kai after Terry Silver bought out Topanga Karate, and Kim Da-eun, a Sensei from South Korea Terry hired, sees more potential in Devon then she does Tory and believes Devon is the future of Cobra Kai, but after Terry's cheating is exposed and Devon helps Tory fight Da-eun, she joins Miyagi-Do in season 6. She later puts laxatives in Kenny's water bottle to earn a spot at Sekai Taikai, which she does, but later feels guilty after realizing Kenny is blaming Anthony LaRusso instead and confesses to Kenny what she did, which Kenny forgives her for; despite Kenny taking her place in Sekai Taikai and she is no longer fighting, she remains at the event to support her team and cheer them on; she also fights in the all dojo-brawl with her team, fighting the Dublin Thunder students alongside Kenny while Samantha is fighting their female Captain. |
| James Payne | Paul Brian Johnson | Kenny and Shawn's father and a U.S. Army soldier serving overseas. |
| Kandace | Rebecca Lines | Tory's maternal aunt. She is cruel, greedy and very uncaring of her family. |
| Lia Cabrera | Milena Rivero | Student at West Valley Middle School, childhood friend and crush of both Anthony LaRusso and Kenny Payne. |
| Charlotte | Phoebe French | One of Terry Silver's newly recruited female students who joins Cobra Kai. Se permanently quits Cobra Kai after Terry Silver's cheating is exposed and joins Miyagi-Do in season 6. However, she rejoins Cobra Kai once more to support Johnny in his match against Sensei Wolf. |
| Lindsey | Gianna Graziano | Another female student recruited by Terry Silver alongside Charlotte and Piper Elswith. She permanently quits Cobra Kai after Terry Silver's cheating is exposed and joins Miyagi-Do in season 6. However, she rejoins Cobra Kai once more to support Johnny in his match against Sensei Wolf. |
| Cheyenne Hamidi | Salome Azizi | Terry Silver's English girlfriend; app developer. She invites Kreese to their tofu brunch party when he shows up unnannounced, which Terry was about to object until Kreese cuts him off and accepts the invite. They most likely broke up after Terry ignored her texts and rejoined Kreese at Cobra Kai. |
| Emile | Kevin Allison | A friend of Cheyenne's, attending a tofu brunch party at Terry's mansion; Kreese is annoyed by him when he says Cobra Kai is a cute name for a Karate dojo. |
| Carla | Alea Figueroa | Terry's maid. She drops some utensils and struggles to pick them up until Terry offers her a hand. |
| René | Frederic Jean | A chef who works for Terry Silver. He expresses concern over Terry's health and offers to call a doctor, which Terry politely declines. He is later seen in Season 6 on Terry's yacht, giving Terry his pills. It is not known if he was present on the yacht when it exploded which killed Terry, Kreese, and Dennis. |
| Vanessa LaRusso | Julia Macchio | Louie LaRusso Jr.'s sister, Daniel's cousin, daughter of Louie LaRusso Sr., and second year graduate student in child psychology. Portrayed by Ralph Macchio's daughter, her interactions with Daniel reference Marisa Tomei's character in Macchio's 1992 film, My Cousin Vinny. In season 4, she accuses Daniel and Amanda of loving Sam more than Anthony, something that angers the latter and Vanessa then says they spoil him with electronics which might have led to his bad behaviour at school. In season 5, she enters a relationship with Anoush, which angers Louie and Louie attacks Anoush, but Louie later forgives Anoush. In season 6, she shows up to the 18th LaRusso Auto Anniversary party where she flips Johnny off behind his back when he tells her he always recognizes a LaRusso; she also feels Daniel is "Bridezillaing" the dealership, which Amanda dismisses until they, along with Sam, witness Daniel shouting at Louie and Anoush, which then Amanda agrees with. |
| Zack Thompson | Brock Duncan | Student at West Valley Middle School, one of Anthony's friends; suspended from school because of bullying Kenny. In season 6, though he doesn't make an appearance onscreen, Zack makes a comment on a video uploaded of Kenny soiling himself calling it hilarious under the username "Zack_attack445". |
| Greg Hughes | P. J. Byrne | Stingray's next door neighbor; later beaten up by Stingray for Greg pointing out Stingray's underage drinking. |
| Slade Wang | Alex Boyer | Student at West Valley Middle School; member of Anthony's gang who helps Anthony catfish Kenny; later suspended along with his friends. |
| Marcus | Jaden Labady | Member of Anthony's gang who helps him bully Kenny at school; eventually suspended. |
| The Hammer | Erik Bello | Hockey players who Johnny insults, but Johnny then blames it on Daniel. After recognizing who Daniel is and making lewd comments about Amanda, Daniel fights them and manages to defeat all of them easily, impressing Johnny. |
| Chester | Jesse Haus | Hockey players who Johnny insults, but Johnny then blames it on Daniel. After recognizing who Daniel is and making lewd comments about Amanda, Daniel fights them and manages to defeat all of them easily, impressing Johnny. |
| Val | Nicolas Coucke | Hockey players who Johnny insults, but Johnny then blames it on Daniel. After recognizing who Daniel is and making lewd comments about Amanda, Daniel fights them and manages to defeat all of them easily, impressing Johnny. |
| Cindee | Avangeline Friedlander | Cindee is the daughter of LaRusso Auto employee Sheila. Samantha used to babysit her. Cindee is celebrating her birthday at a party place which is attended by The LaRusso family and Miguel while Tory is working their as an entertainer. |
| Gavin | Brian Troxell | A new member of the All Valley Committee who replaces Daniel as Daniel has become a full time Sensei. |
| Principal Fitzpatrick | Michael Burgess | Anthony and Kenny's principal, who suspends Anthony and his friends for bullying Kenny on a regular basis. |
| Carrie Underwood | Herself | In Cobra Kai, she is a multi-Grammy Award-winning country pop singer who is invited by Ron to the 51st All-Valley Karate Tournament. |
| Referee | Marcus Young | The referee of the 2019 All Valley Karate Tournament who was bribed by Terry Silver to give Cobra Kai the win, which was discovered by Tory who became distraught after relaizing she only won due to the Tournament being rigged. |
| Detective | Franco Castan | A detective who arrests John Kreese for the assault on Stingray, unaware John was being framed by Terry Silver for the assault. He later re-appears in Season 5 during Terry arrest and informs Daniel and Johnny about John Kreese's escape from prison. |
| Character | Actor | Description |
| Hector Salazar | Luis Roberto Guzmán | Miguel's biological father, Carmen's ex-husband and a criminal originally from Ecuador now residing in Mexico. He was unaware of Miguel being his biological son as Carmen left him before Miguel was born. Hector has remarried to a Mexican woman named Maria and became stepfather to her son, Luis. Although Miguel and Hector bonded at first, after Hector said he regrets nothing about his past, an upset Miguel decides to depart and heads back home, not telling him he is Hector's biological son. |
| Maria | Elvia Hill | Hector's Mexican wife, mother of Luis and Miguel's stepmother. She is unaware of Hector's crimes in Ecuador and also unaware Miguel is Hector's biological son. |
| Luis | EJ Sanchez | Biological son of Maria, Hector's stepson and Miguel's stepbrother. Miguel saved his life when he nearly got hit by a car. |
| Owen | Josh Lawson | An Australian thief on vacation in Mexico who steals money from Miguel. He later attempts to steal money from Johnny, only for Johnny to stop him and along with Robby fight and defeat Owen and his gang. |
| Vicente "The Wolf" Gonzales | Eryk Anders | A cage fighter in Mexico who attacks Johnny under Hector's orders, but Robby saves his dad throwing him a hot chilli pepper that Johnny then puts in The Wolf's eyes, stinging and temporary blinding him and Johnny manages to defeat him. |
| Eva Garcia | Darla Delgado | An emcee at a charity event, which is hosted at Terry Silver's mansion which Daniel and Amanda also attend. |
| Joanne | Rachelle Carson-Begley | Amanda's mother, Samantha and Anthony's maternal grandmother, and Daniel's mother-in-law who lives in Ohio and who divorced her husband after he cheated on her. She supports Amanda when she has a difficult moment in her marriage. She is the aunt of Jessica Andrews. |
| Elizabeth-Anne Rooney | Sunny Mabrey | Rival and former classmate of Amanda and Jessica, whom Jessica refers to in The Karate Kid III who stole Jessica's boyfriend. She and her gang of friends confront Amanda and Jessica in a bar; after trading insults with each other, including calling Amanda by her high school nickname "Babe Ruthless", Elizabeth and her gang attack Amanda and Jessica, but Samantha saves them by using her Karate skills on Elizabeth knocking her down, making Elizabeth's gang back off from attacking any further and Amanda, Jessica, Samantha and Anthony flee the bar. |
| Kim Da-eun | Alicia Hannah-Kim, Sarah Anne | The secondary antagonist of season 5, and a major antagonist turned anti-heroine in season 6. She is a Korean karate master that is summoned to the United States by Terry Silver to be a Cobra Kai sensei, and despite Tory being the champion, she dislikes Tory and believes Devon Lee is the future of Cobra Kai as she sees more potential in her; after attacking Tory, Sam and Devon come to Tory's rescue, with Kim thinking Devon was a traitor, but once Terry's cheating was exposed, Kim flees and returns to South Korea and joins forces with John Kreese instead in season 6. After the death of her student, Kwon, who died at the Sekai Taikai all-dojo brawl, she, Kreese and their dojo returned to Korea in disgrace. After her grandfather, Kim Sun-Yung, orders her to kill Kreese, she turns the tables on her grandfather and kills him instead as she wants to run the dojo her way in a more peaceful manner. She later ends up in a relationship with former rival-turned-friend, Chozen. |
| Kim Sun-Yung | Don L. Lee; flashback,
C.S. Lee | The overarching antagonist of The Karate Kid franchise as a whole. A South Korean karate sensei who trained both John Kreese and Terry Silver, ultimately turning them into the cruel men they are today; built the philosophy of the Cobra Kai dojo: "Strike First, Strike Hard, No Mercy." He is the unseen overarching antagonist of The Karate Kid and The Karate Kid Part III, and the overarching antagonist of Cobra Kai. He is later killed by his granddaughter, Kim Da-eun, after he ordered her to kill Kreese; Da-eun killed him as she wants to run the dojo her way and in a more peaceful manner. |
| Sensei Rosenthal | Spence Maughon | A Sensei at Topanga Karate who is shocked upon learning Terry purchased the dojo and is renaming it Cobra Kai. |
| Gunther Braun | Carsten Norgaard | German representative for the Sekai Taikai karate tournament and was once a Sekai Taikai champion himself. After disqualifying the Russian dojo Tiger Strike as four of their students tested positively for drugs, during the Tournament, Tiger Strike's Sensei Ivanov punches out Gunther cold, leading to the all dojo-brawl, which ended in tragedy with the death of Korean Cobra Kai student Kwon Jae-Sung; Gunther cancels the remainder of Sekai Taikai. A month later, Terry Silver convinces Gunther to continue the Tournament; Gunther agrees on the condition all dojos unamiously agree to continue the Tournament, which happens, but the tournament is now held at the All Valley Sports Arena. Gunther later has a brief rivalry with Daryl, member of the All Valley Committee over who would be master of ceremonies at the Sekai Taikai, with Gunther winning the rights to announce after he knocked Daryl down with a single kick; Gunther and Daryl later make peace when the final match takes place between Johnny and Wolf and Gunther lets Daryl announce the final round. |
| Gabriel | Owen Harn | Criminal who beats up John Kreese in the prison; implied to have helped Kreese fake his death and escape prison. |
| Holly | Cece Kelly | A girl that makes out with Miguel at Miyagi-Do and Eagle Fang's celebration party after they qualified for Sekai Taikai. |
| Sensei Odell | Tyron Woodley | Kim Da-eun's six hired Senseis she brings with her to California; they put fear into the Cobra Kai students who talk back or refuse to obey. During the house brawl at Terry Silver's mansion, while Chozen goes to fight Terry, Mike Barnes is knocked out unconscious, leaving Johnny alone to fight them where he gets easily overpowered, but after seeing the photo of his unborn daughter's ultrasound, he gets his strength back and starts fighting them; Mike eventually regains his conscious and together, Johnny and Mike manage to defeat them all; at one point during the fight, Min-Jun accidentally cuts off Odell's pinky finger with a sword. |
| Sensei Morozov | Stephen Thompson | Kim Da-eun's six hired Senseis she brings with her to California; they put fear into the Cobra Kai students who talk back or refuse to obey. During the house brawl at Terry Silver's mansion, while Chozen goes to fight Terry, Mike Barnes is knocked out unconscious, leaving Johnny alone to fight them where he gets easily overpowered, but after seeing the photo of his unborn daughter's ultrasound, he gets his strength back and starts fighting them; Mike eventually regains his conscious and together, Johnny and Mike manage to defeat them all; at one point during the fight, Min-Jun accidentally cuts off Odell's pinky finger with a sword. |
| Sensei Hyan-Woo | Jake Huang | Kim Da-eun's six hired Senseis she brings with her to California; they put fear into the Cobra Kai students who talk back or refuse to obey. During the house brawl at Terry Silver's mansion, while Chozen goes to fight Terry, Mike Barnes is knocked out unconscious, leaving Johnny alone to fight them where he gets easily overpowered, but after seeing the photo of his unborn daughter's ultrasound, he gets his strength back and starts fighting them; Mike eventually regains his conscious and together, Johnny and Mike manage to defeat them all; at one point during the fight, Min-Jun accidentally cuts off Odell's pinky finger with a sword. |
| Sensei Min-Jun | Dante Ha | Kim Da-eun's six hired Senseis she brings with her to California; they put fear into the Cobra Kai students who talk back or refuse to obey. During the house brawl at Terry Silver's mansion, while Chozen goes to fight Terry, Mike Barnes is knocked out unconscious, leaving Johnny alone to fight them where he gets easily overpowered, but after seeing the photo of his unborn daughter's ultrasound, he gets his strength back and starts fighting them; Mike eventually regains his conscious and together, Johnny and Mike manage to defeat them all; at one point during the fight, Min-Jun accidentally cuts off Odell's pinky finger with a sword. |
| Sensei Bacaria | Craig Henningsen | Kim Da-eun's six hired Senseis she brings with her to California; they put fear into the Cobra Kai students who talk back or refuse to obey. During the house brawl at Terry Silver's mansion, while Chozen goes to fight Terry, Mike Barnes is knocked out unconscious, leaving Johnny alone to fight them where he gets easily overpowered, but after seeing the photo of his unborn daughter's ultrasound, he gets his strength back and starts fighting them; Mike eventually regains his conscious and together, Johnny and Mike manage to defeat them all; at one point during the fight, Min-Jun accidentally cuts off Odell's pinky finger with a sword. |
| Sensei Suk-Chin | Steve Brown | Kim Da-eun's six hired Senseis she brings with her to California; they put fear into the Cobra Kai students who talk back or refuse to obey. During the house brawl at Terry Silver's mansion, while Chozen goes to fight Terry, Mike Barnes is knocked out unconscious, leaving Johnny alone to fight them where he gets easily overpowered, but after seeing the photo of his unborn daughter's ultrasound, he gets his strength back and starts fighting them; Mike eventually regains his conscious and together, Johnny and Mike manage to defeat them all; at one point during the fight, Min-Jun accidentally cuts off Odell's pinky finger with a sword. |
| Dr. Emily Folsom | Tracey Bonner | Psychiatrist at John Kreese's prison; she sees through Kreese's lies when he tried to smooth talk her to get a recommendation to get out of prison early. The next day during another session, in Kreese's mind, he sees visions of Betsy, Captain Turner, Tory, Terry, young 1984 Johnny Lawrence who turns into present-day Johnny, and lastly, a young version of himself sitting in Dr. Folsom's chair. During a much later session, Kreese used her keycard to escape prison which he succusfully stole when he fakes a break down with crocodile tears and she comforts him, giving him the chance to steal it when she isn't looking. |
| Reggie | Kevin Saunders | A limo driver and a friend of Louie's who brings Louie, Daniel, Amanda, Johnny, Carmen and Chozen to a dance club for a night of fun and dancing. When his back is turned, Mike Barnes sneaks into his limo and once Daniel, Johnny and Chozen enter the limo to head to another bar, Mike drives off without Reggie noticing. |
| Dr. Howard | Aba Arthur | Carmen's doctor who does the babysound for her and Johnny's baby. She reappears in season 6 when Carmen had to go under an emergency cerclage, but told Johnny she was healthy and needed bedrest for several weeks; she then appears to help delivery the baby. |
| Character | Actor | Description |
| Zenker | Christian Carlson | The president of the fraternity “Theta Omega” at the College of the Valley who is put Kyler through a cruel hazing and lets Kyler think he is getting into the fraternity when in reality he was plotting to drop Kyler during the ceremony. Kyler, along with Brucks, Miguel, Hawk and Demetri fight and defeat Zenker and his fraternity brothers. |
| Baz | Nick Jandl | A real estate agent who refuses to sell a home to Johnny when Johnny is house hunting for his family with Chozen's help. |
| Stevie | Adam Herschman | A man selling his home when Johnny is house hunting for his family with Chozen's help. Stevie recognizes and remembers Johnny from the '83 All Valley Karate Tournament and apologizes to Johnny for Baz's behaviour. In the series finale, Johnny buys the house from him, moving Carmen and their daughter into their new home. |
| Kwon Jae-Sung | Brandon H. Lee | The central antagonist to the Miyagi-Do students in season 6. He is the top student of Kim Da-eun's dojang who goes on to become the male captain of the newly revived Cobra Kai. During the all-dojo brawl at the Sekai Taikai, he accidentally impales himself with Kreese's knife while fighting Axel Kovačević, which kills him. His body is later burned on a funeral pyre by Kreese and Da-eun. Not counting flashbacks, Kwon is the third character to die onscreen in the series, the first character to die from karate, and the first child/teen to die. |
| Yoon Do-Jin | Daniel J. Kim | Another student of Kim Da-eun's dojang. Formerly the top student of the dojang until defeated by Kwon. After Kwon's death, he is forced to undergo brutal training from Kim Sun-Yung until Kreese intervenes and sends him away. |
| Shane Page | Tony Cavalero | Owner of a boxing gym founded by his grandfather and Mr. Miyagi in the 1940s and who tells Daniel and Chozen about Mr. Miyagi's past of having committed assault and theft once. |
| Grace Nichols | Bethany DeZelle | Tory and Brandon's mother. She dies of a pulmonary embolism in the first part of season 6. |
| Dr. Judith | Deja Dee | Grace Nichols doctor. After Grace passes, she informs Tory about what caused her death. The next day, she calls and informs Amanda LaRusso about Grace's death. |
| Sensei Feng "Wolf" Xiao | Lewis Tan | One of the three main antagonists of season 6, and the final antagonist of Cobra Kai. Sensei of the Hong Kong-based Iron Dragons, and a three time Sekai Taikai champion. He forms an alliance with Terry Silver, and develops a rivalry with Johnny Lawrence over the course of season 6. In their final match, Johnny defeats Wolf using the defensive techniques taught to him by Daniel, mirroring Johnny's own defeat in The Karate Kid. |
| Axel Kovačević | Patrick Luwis | The male captain of the Iron Dragons. He develops romantic feelings for Samantha LaRusso, but is turned down by her. This leads to him developing an intense hatred for Miguel Diaz, Sam's boyfriend. He unintentionally and indirectly kills Kwon Jae-Sung by kicking him during the all-dojo brawl, causing him to fall on Kreese's knife. Later, Axel injures Robby Keene, but in his final fight with Miguel, he chooses to fight fair despite Wolf's urging and is defeated. Disgusted with Wolf, Axel then quits the Iron Dragons. |
| Zara Malik | Rayna Vallandingham | The female captain of the Iron Dragons. She is Tory's main rival during the Sekai Taikai. She is highly skilled in karate while also a frequently vlogger on her phone. Their rivalry gets more personal later on when Zara has a one-night stand with a drunk Robby Keene. She is later defeated by Tory during their final match. |
| Maria Alvarez | Jewelianna Ramos-Ortiz | The female captain of the Spanish team Furia de Pantera. She is a formidable opponent who makes it to the semi-finals of the Sekai Taikai, and also develops romantic feelings for Demetri by dancing with him. Later on, she and her team fight alongside Demetri and Hawk during the all-dojo brawl, making her dojo one of the few dojos to be allies with Miyagi-Do and not their enemies. |
| Diego Aguilar | Justin Ortiz | The male captain of the Spanish team Furia de Pantera. He has a mohawk similar to Hawk. Along with Maria and their team, they fight alongside Demetri and Hawk during the all-dojo brawl, making his dojo one of the few dojos to be allies with Miyagi-Do and not their enemies. |
| Cara McAllistar | Caitlin Hutson | The female captain of the Irish team Dublin Thunder. She is very ruthless and a highly skilled martial artist. She vowed revenge against Samantha after her dojo lost the first round and is defeated once again during the all-dojo brawl. |
| Ivanov | Joshua Lamboy | The Russian Sensai's of Tiger Strike. After their dojo was disqualified from Sekai Taikai as four of their students tested positive for PEDs, they swear revenge on Gunther and later during Sekai Taikai, they start the all-dojo brawl by attacking Gunther and Sekai Taikai officials. During the brawl, they fight Chozen and Kim Da-Eun, but are defeated by them along with Gunther's help. After the brawl ended in the death of Korean Cobra Kai student Kwon, Tiger Strike was permanently banned from future Sekai Taikai tournaments. |
| Oksana | Britt Baker | The Russian Sensai's of Tiger Strike. After their dojo was disqualified from Sekai Taikai as four of their students tested positive for PEDs, they swear revenge on Gunther and later during Sekai Taikai, they start the all-dojo brawl by attacking Gunther and Sekai Taikai officials. During the brawl, they fight Chozen and Kim Da-Eun, but are defeated by them along with Gunther's help. After the brawl ended in the death of Korean Cobra Kai student Kwon, Tiger Strike was permanently banned from future Sekai Taikai tournaments. |
| Vlad | Daniel Wheat | The male captain of Russian team Tiger Strike. After Tiger Strike is disqualified from Sekai Taikai as four of the students tested positive for drugs, they start the all-dojo brawl. After the death of Korean Cobra Kai student Kwon, Tiger Strike was permanently banned from future Sekai Taikai events. Though not confirmed, Vlad was most likely one of the four Tiger Strike students who tested positive for drugs since he was the captain. |
| Gunther's assistant | Linda Bustamantle | Gunther's Spanish assistant who informs Gunther on Tiger Strike testing positively for drugs. She is later brutally attacked by Sensei Oksana of Tiger Strike when she pleads with everyone to stop fighting at the all-dojo brawl. |
| Stew | Josh Banks | A belligerent passenger who is rude towards everyone on the plane on its way to California, including Johnny and the flight attendant. Miguel knocks him out cold, resulting in all of the passengers on the plane to clap appreciatively. |
| Flight Attendant | Sharayu Mahale | A flight attendant who warns Johnny and the belligerent passenger to stop fighting or she'll get the Captain involved. |
| Jace | Jesse Malinowski | Shannon's current boyfriend. He is at the school in Counselor Blatt's office alongside Shannon, Robby, Johnny and Carmen to discuss Robby's future. |
| Winnie Taylor | Elizabeth Berkley | Moon's mother and also mother to an older daughter in college named Sage. She is good friends with Daniel and Amanda and spends a day out with them, along with Chozen for wine tasting. She introduces Chozen to tarot cards and after hearing about his heartbreaking letter from Kumiko, she ensures Chozen there is somebody out there special for him, and Chozen and Winnie become friends and they toast. |
| Laura Lawrence-Diaz | N/A | Johnny and Carmen's daughter, maternal granddaughter of Rosa and younger paternal and maternal half-sister of Robby and Miguel respectively, born in part 3 of season 6. Was named after her late paternal grandmother, Laura Lawrence. |
| Kevin Burkhardt | Himself | Sportscaster Kevin Burkhardt and former American professional football player Ryan Clark are present at the Sekai Taikai at the All Valley Sports Arena broadcasting the event. |
| Ryan Clark | Himself | Sportscaster Kevin Burkhardt and former American professional football player Ryan Clark are present at the Sekai Taikai at the All Valley Sports Arena broadcasting the event. |
| Julia | Charlene Amoia | A business woman who offers Tory and Robby a career offer for marketing and promoting karate worldwide together, which they both accept. |
| Ezra | Hayden Schlossberg | Terry Silver's lawyer. |
| Autograph Girl #1 | Hadley Hurwitz | Two fans getting Robby and Tory's autographs. These girls were portrayed by the daughters of Cobra Kai creator Jon Hurwitz. |
| Autograph Girl #2 | Elizabeth Hurwitz | Two fans getting Robby and Tory's autographs. These girls were portrayed by the daughters of Cobra Kai creator Jon Hurwitz. |
| Blue Shirt Boy Outside Dojo | Andrew Weintraub | A kid waiting in line to sign up for and join Cobra Kai. He's portrayed by the grandson of the late producer Jerry Weintraub, who produced The Karate Kid films. |
| Jeremy | Josh Heald | Two business men at a restaurant discussing a Back to the Future reboot. These are two of the Cobra Kai creators making a cameo appearance in the final scene for the series finale. |
| Jake | Jon Hurwitz | Two business men at a restaurant discussing a Back to the Future reboot. These are two of the Cobra Kai creators making a cameo appearance in the final scene for the series finale. |