List of Star Trek characters (G–M)
This article lists characters of Star Trek that received attention from third-party sources in their various canonical incarnations. This includes fictional major characters and fictional minor characters created for Star Trek, fictional characters not originally created for Star Trek, and real-life persons appearing in a fictional manner, such as holodeck recreations.
Characters from all series, listed alphabetically
Key
G
| Character | Actor | Appearances | Description |
| Andrew J. Robinson | Past Prologue recurring thereafter | Cardassian male, former member of the Cardassian intelligence organization Obsidian Order, who fell from grace and was exiled to Deep Space Nine, where he worked in his own tailor shop. Son of Enabran Tain, former head of the Obsidian Order, and archenemy of Gul Dukat. | |
| Tricia O'Neil Kacey Rohl | Yesterday's Enterprise, S31 | Human female captain of the Enterprise-C, which traveled unintentionally through a time portal. Garrett decided to return the ship to her own timeline, which resulted in her death though brought about peace. A younger version of Garrett is a Starfleet liaison to the Section 31 organization. | |
| Lycia Naff | Q Who, Samaritan Snare, First First Contact | A human ensign serving under Geordi La Forge on the Enterprise-D. While she initially struggles due to her inexperience, La Forge mentors her and helps her build self-confidence. Years later, she becomes captain of the Archimedes. The character was originally written as a potential love interest for La Forge. | |
| Phillip Pine | The Savage Curtain Demons | In TOS: Human warlord and despot of the 21st century, notorious for striking at his enemies while negotiating with them. An Excalbian image of him, part of an experiment to study the human concepts of good and evil, led the four-being team which represented evil. In Enterprise, Colonel Green is shown in a historical video used by the group Terra Prime to justify their existence. | |
| Jane Wyatt Majel Barrett Cynthia Blaise Winona Ryder Mia Kirshner | Journey to Babel, Yesteryear, TVH, TFF, ST09, Lethe, Will You Take My Hand?, Brother Charades | Spock's human mother, married to Sarek. In one timeline, she dies between the events in Star Trek IV: The Voyage Home and the Star Trek: The Next Generation episode "Sarek". In the alternate timeline depicted in the 2009 Star Trek movie, she dies when Vulcan is destroyed. Grayson was first portrayed by Jane Wyatt, who appears in both "Journey to Babel" and The Voyage Home. Majel Barrett provided the voice of Amanda in the animated Star Trek series. Cynthia Blaise played her in Star Trek V: The Final Frontier. In the 2009 film Star Trek, the role of Amanda Grayson was played by Winona Ryder. Mia Kirshner played Amanda on the prequel series Star Trek: Discovery and Star Trek: Strange New Worlds. | |
| Guinan | Whoopi Goldberg Isis J. Jones Ito Aghayere | The Child, recurring thereafter GEN NEM PIC | Enigmatic female El-Aurian Bartender of the Ten Forward Lounge on the Enterprise-D, whose wise counsel proved invaluable many times. She shares a close bond with Captain Picard. |
H
I
| Character | Actor | Appearances | Description |
| Ihat | None | Masks | A masculine personality associated with a ceremonial neckplate with a wings-like design. Data assumes the personality of Ihat multiple times. |
| Persis Khambatta | TMP | A female native of Delta IV, she was once involved in a romantic relationship with Willard Decker. As a Starfleet lieutenant, she was assigned to the Enterprise as navigator during the V'ger crisis. She was killed on the Bridge by one of V'ger's probes, but her appearance was later given to another V'ger probe, which was put aboard the Enterprise and assigned to learn about the human "infestation". However, this "Ilia probe" was constructed so perfectly by V'ger that it even contained the real Ilia's memories, which were deeply suppressed. Decker, however, was able to access those memories and establish a personal rapport with the probe. Later, when he learned that V'ger needed a "human element" to reveal its data – and, in so doing, stop its attack on Earth – he input the final code sequence manually, and, together with the Ilia probe, merged with V'ger. Ilia was later listed as "missing" in action. |