List of The Underland Chronicles characters

Humans

Overlanders

• Gregor - Gregor is an eleven-year-old New Yorker who discovers the Underland when his little sister Margaret, nicknamed Boots, falls into their apartments ventilation system. He is believed to be the "warrior" described in Bartholomew of Sandwich's prophecies. He is also a rager, or someone who is overcome by a kind of powerful frenzy in battle that is hard to control. Gregor tries to avoid fighting when he can, at first because he believes that a peaceful resolution to a problem is the best kind of solution, and later because he is scared of how good he is at fighting due to his rager "powers". In Gregor and the Code of Claw, he learns echolocation, a valuable skill for fighting in the dark. In Gregor the Overlander, he bonds with the flier Ares. He develops romantic feelings for Luxa, but their relationship does not progress much further than a first kiss in Gregor and the Code of Claw.
• Boots - Gregor's youngest sister, named "Margaret" after her paternal great-grandmother; the name "Boots" originated because of how she liked to steal the family's shoes during the winter. Boots is an affectionate and friendly two-year-old. She has a special relationship with the crawlers, who revere her and call her "Princess". She also seems to have an affinity for languages, an uncanny ability to solve puzzles and notice slight differences, and is nearly fluent in Crawler by the end of the series. Despite many terrifying experiences, she remains a happy and good-natured toddler throughout the series. She is not able to pronounce Gregor's name correctly until the final pages of Gregor and the Code of Claw, having previously called him "Ge-go" or "Gre-go".
• Bartholomew of Sandwich - ' An Overlander with supposed prophetic ability who first led a group of other Overlanders into the Underland because he believed all surface life would someday end. He is the author of all the prophecies the Underlanders adhere to. Sandwich also led the original campaign to claim the land of Regalia, which he won by poisoning the water supply of the previous owners. This gave him and all of his human companions the reputation of being heartless, greedy killers. '
• Grace - Gregor's mother, known as "Maker of the Princess and Most Fearsome Swatter" to the crawlers. She is extremely protective of her children, which ironically leads to her being forced to allow her family to return to the Underland frequently, as she catches the plague in Gregor and the Curse of the Warmbloods and must stay below for treatment. Her greatest desire is to move her family to Virginia to get them away from the Underland.
• Gregor's dad - A high school science teacher married to Grace and the father of Boots, Lizzie, and Gregor. Exactly two years, seven months, and thirteen days before the start of Gregor the Overlander, he fell into the Underland, and was shortly captured by gnawers, who allowed him to live in return for him making weapons for them. He made them "nothing that worked twice" and was mentally and physically abused as a result. He struggles to overcome what is likely PTSD and also a strange Underland illness throughout the series. His name is never disclosed.
• Gregor's grandmother - Senile but wise, she is very interested in fate and prophecies, and supports Gregor's actions to follow them. In Book 5, she is hospitalized with a heart problem, which delays Gregor's family from leaving for Virginia. Her name is never disclosed.
• Lizzie - Gregor's middle sister, who goes by the nickname "Lizzie". She is very smart and good at puzzles, leading to her breaking the "Code of Claw" in Book 5. She suffers from panic attacks. She befriends Ripred, whom she reminds of Silksharp, his deceased pup. She enjoys giving him food he likes, and he is a kind of father figure toward her.
• * Jedidiah - Lizzie's only friend. Jedidiah is serious and formal, interested in puzzles, electronics, and building things. He calls Lizzie by her given name, Elizabeth.
• Mrs. Cormaci - Gregor's neighbor in his Overland apartment building. She learns of Gregor's adventures at the end of the Gregor and the Curse of the Warmbloods, and becomes a "guardian angel" to Gregor's battered family. She is very understanding of Gregor and seems to know exactly what he and his family need.
• * Mr. Cormaci - ' Husband of Mrs. Cormaci, a veteran who Gregor remembers as a kind old man. He died approximately five years before the first book. '
• Larry and Angelina - Gregor's friends at school. Larry is asthmatic and likes to draw. Angelina is an actress.
• Hazard's Mother - ' Met and married Hamnet after he fled to the Jungle. She had one child, Hazard, before being killed by "bugs whose bite brought quick death." '
• Fred Clark - ' An Overlander who fell sometime before Gregor and his sister - died in the Underland. '
• Coco - ' The last Overlander to fall before Gregor - died in the Underland. '
• Mickey - ' An Overlander who fell sometime before Gregor and Boots - died in the Underland. '
• Mr. Otts - A man who buys the antiques that Gregor takes from the museum in the Underland.
• Rodney - Gregor's cousin.
• Lucy - Gregor's grandma's cousin.

  Underlanders

• Queen Luxa - Luxa is the crown princess of Regalia, as her late parents were the king and queen of the city. She is the same age as Gregor and will assume full royal powers when she becomes sixteen-years-old. Luxa is a smart, rebellious, and an excellent fighter. She is also a wise leader, though sometimes sharp-tongued towards others. When Gregor first encounters her, he thinks she is arrogant and haughty, but her personality changes significantly after the death of her cousin and close friend Henry. Sometime between the end of Book 2 and the start of Book 3, she becomes trapped in the Jungle because her bond Aurora dislocates her wing and can not be moved. Afterwards she becomes very close to the nibblers who took care of her and her bat while they were there, going as far as declaring war on the gnawers when they attempt to eradicate the mice colonies. In the final book, she brings peace between the gnawers and the humans by bonding with Ripred and swearing to protect the rats. Over time, she develops romantic feelings for Gregor the Overlander, though the two part ways in Gregor and the Code of Claw. Her name is possibly derived from the word 'Lux', which means light in Latin.
• Vikus - Luxa's maternal grandfather, a Regalian diplomat, and head of the council which rules Regalia until Luxa reaches maturity. Vikus is a compassionate and wise person and always believes in the best of others. He is convinced that a peaceful resolution may be found in nearly every conflict, which brings him into conflict with many around him, including his wife Solovet, and granddaughter Luxa. In Gregor and the Code of Claw, he experiences a stroke that leaves the right side of his body mostly paralyzed.
• Prince Henry - Luxa's royal cousin and the first bond of the flier Ares. Aged 16, he attempted to covertly ally the humans with the rats to conquer the whole of the Underland and dies with King Gorger and the gnawer attack force when Gregor lures them off a cliff. Henry also tries to kill Ripred, an ally of the humans. He is a sharp-tongued, quick-witted troublemaker and disdainful of what he considers the "weaker" species, such as cockroaches. In later books, Luxa, Aurora, and Ares still miss him, though with some bitterness. '
• Howard - Luxa's eldest cousin on her mother's side and bond to the flier Pandora. He is trained in first aid and works in the Regalian hospital during the outbreak of the plague; other doctors believe he has a gift for healing. He is one of the first plague victims in the third book. After the death of his bond Pandora, he is without a flier companion, but becomes close to a bat named Nike. Though at first, she does not like him, he eventually becomes a kind of older brother figure to Princess Luxa.
• * Susannah - Howard's mother and daughter of Vikus and Solovet. She works in the Regalian hospital for some time while her son is there with the plague. She is kind and motherly toward Gregor, and appreciates his friendship with her son. She is named after Shakespeare's daughter Susanna, who had twin siblings, Judith and Hamnet, appearing in the series as well.
• * York - Howard's father, husband of Susannah, and governor of the Fount. He is a very large man and a loud fighter; he battles alongside Gregor during the fifth book.
• * Stellovet - Howard's younger sister. She is heavily disliked by Luxa because she dreams of the royal family dying so she can become the queen of Regalia. Not of royal descent.
• * Hero - Howard's second-youngest sister. Not of royal descent.
• * Kent - Howard's younger brother. Not of royal descent.
• * Chim - Howard's youngest sister. Around five years old. Her full name is unknown, though it is believed to sound something like the word "chimney". Not of royal descent.
• Solovet - Luxa's maternal grandmother and the Regalian army's leader, except for immediately after being put on trial for treason for ordering the creation of a biological weapon. When he first meets her, Gregor the Overlander believes her to be kind and soft-spoken, but he later learns that she is, in reality, ruthless, cunning, and manipulative. She is never hesitant to use any influence she might have over a person in order to control him/her, a character trait which estranges her from several people, including her husband Vikus and son Hamnet. She is killed with the Underlanders Horatio and Marcus during a gnawer ambush while on a mission to recruit the spinners to the Regalian war effort. '
• Hamnet - Luxa's uncle and twin of Judith, Luxa's mother. He left Regalia for the Jungle after leading an attack to reclaim the Garden of Hesperides from the gnawers because of the terrible destruction he witnessed there and the cruelty he recognized in his mother Solovet. Though an excellent swordsman, Hamnet likes to find other ways to solve problems; living in the Jungle for ten years has taught him that not all creatures have to fight. Sometime before the first book, he met and married an Overlander, and the two had a Halflander child Hazard. He is named after Shakespeare's son, who died at a young age. He had a twin Judith, and a sister Susanna, who appears in the series as well. '
• * Judith - Luxa's mother and daughter of Vikus and Solovet. She is Hamnet's twin, and died at the hands of King Gorger. She is named after Shakespeare's daughter Judith, who had a twin brother Hamnet and a sister Susanna, appearing in the series too.'
• Princess Nerissa - Luxa's cousin. She is the next heir to the throne of Regalia after Luxa, and takes over for her during the latter's absence in Gregor and the Curse of the Warmbloods. Nerissa is described as very frail, bordering on emaciated after the death of her brother. She sometimes has visions of the past or future and is arguably the best interpreter of Bartholomew of Sandwich's prophecies. Despite this fact, her sanity is frequently questioned by those around her, and occasionally by herself. Though very intelligent and a fair ruler, she does not wish to be queen and struggles to cope with her visions on a day-to-day basis.
• Mareth - Regalian soldier and military trainer. One of Gregor's better friends. Though his leg is amputated sometime after Gregor and the Prophecy of Bane, he remains an instructor and a sort of general, and also keeps his good humor.
• Neveeve - A Regalian doctor who developed a plague known as the "Curse of the Warmbloods" under the orders of Solovet. She is sentenced to death for her participation, though she also developed a cure for the disease. '
• Dulcet - A kind and clever Regalian nanny who cares for young children in the humans' palace, aged around fifteen.
• Horatio and Marcus - Gregor's two temporary guards during the final book. Horatio has a soft spot for Dulcet. They die with Solovet. '
• Miravet - Sister of Solovet who works in the Regalia castle's armory. She is kinder and more affectionate than her sister.
• Perdita - A Regalian soldier. She is one of Gregor's guards in the first novel, and is injured during his fight with the gnawers Fangor and Shed. She trains Gregor in Gregor and the Code of Claw. Perdita is made acting head of the Regalian army after Solovet is killed.
• Miranda - Regalian castle servant
• Lucent - Regalian castle servant
• Claudius - Regalian guard.
• Anchel -
• Daphne -
• Keeda - An Underlander that mentions Anchel and Daphne, both dead, killed by rats. Keeda dies of exhaustion.