Title: Characters of the Marvel Cinematic Universe
Content:  Nebula (portrayed by Karen Gillan) is an Avenger, member of the Guardians of the Galaxy and former lieutenant of Thanos, who raised her as his daughter along with Gamora. Nebula was created by Roger Stern and John Buscema and first appears in the film Guardians of the Galaxy as a secondary antagonist within the film but in later appearances she is portrayed as more sympathetic. Eventually, Nebula teams up with the Guardians of the Galaxy and then joins the Avengers to defeat her foster father. Though the current version of her joins the Avengers, a past version allies with Thanos to stop the Avengers. This is due to fear, causing the present Nebula to have to kill her past counterpart. , the character has appeared in four films: Guardians of the Galaxy, Guardians of the Galaxy Vol. 2, Avengers: Infinity War, and Avengers: Endgame. An alternate version of the character sometimes dubbed "Heist Nebula" appears in the Disney+ animated series What If...?. She will return in the upcoming films Thor: Love and Thunder and Guardians of the Galaxy Vol. 3, as well as The Guardians of the Galaxy Holiday Special.
Title: Nebula (character)
Content:  Nebula is a fictional character appearing in American comic books published by Marvel Comics. Created by Roger Stern and John Buscema, the character first appeared in The Avengers #257 (July 1985). Originally depicted as a supervillain, Nebula was later depicted as an antihero and member of the Guardians of the Galaxy. Nebula has appeared in various adaptations of the character in other media, including animated television series and video games. Karen Gillan portrays the character in the Marvel Cinematic Universe films Guardians of the Galaxy (2014), Guardians of the Galaxy Vol. 2 (2017), Avengers: Infinity War (2018), Avengers: Endgame (2019), and the upcoming film Thor: Love and Thunder (2022) as well as voices alternate timeline versions in the Disney+ animated series What If...? (2021).
Title: Nebula (character)
Content:  Karen Gillan portrays Nebula in media set in the Marvel Cinematic Universe. This version is one of several adopted children raised by Thanos alongside her adopted sister Gamora, with whom she developed a rivalry. Over time, Nebula developed an obsessive need to best Gamora in combat, but every time she lost, Thanos subjected her to torturous mutilation, replacing parts of her body with cybernetic enhancements. This imbued Nebula with a deep hatred toward Thanos as well as resentment towards Gamora for not treating her like a sister. Throughout the live-action films Guardians of the Galaxy, Guardians of the Galaxy Vol. 2, Avengers: Infinity War, and Avengers: Endgame, Nebula eventually reconciles with Gamora, becomes a member of the Guardians of the Galaxy, and works with the Avengers to stop Thanos. Additionally, Gillan voices alternate timeline versions of Nebula in the Disney+ animated series What If...?
Title: Nebula (Marvel Cinematic Universe)
Content:  In her debut in Guardians of the Galaxy, Nebula is depicted as a loyal lieutenant in the employ of Ronan and Thanos. About the character, Gillan said, "She is the female villain of the film ... She is very sadistic and evil, but I like to think for a very valid reason." She also added, "I think she's a really interesting character. What I like to play around with is how jealous she is. She's Gamora's sister, and there's a lot of sibling rivalry. That's the most interesting aspect to me, because jealousy can consume you and turn you bitter, and ugly. And she's a total sadist, so that's fun too." Gillan researched the ancient Spartans, shaved off 
Title: Nebula (Marvel Cinematic Universe)
Content:  Nebula is a fictional character in the Marvel Cinematic Universe (MCU) media franchise, portrayed by Karen Gillan, based on the Marvel Comics character of the same name. She is depicted as a blue-skinned alien warrior who is both the adoptive daughter of Thanos, who killed her blood family before raising her, and the adoptive sister of Gamora, with whom she grew to share a bitter rivalry. Although she is first introduced in Guardians of the Galaxy (2014) as an antagonist, subsequent films see her develop into a antihero and eventually a secondary protagonist, who joins her sister as part of the Guardians of the Galaxy and becomes a member of the Avengers. The character was met with positive reception, specifically for Gillan's performance and redemptive story arc; she has been noted for her differences from the comics, in which Nebula is almost exclusively depicted as a villain. , Nebula has appeared in four films, as well as in the animated series What If...? (2021) as alternate versions. She will return in the upcoming films Thor: Love and Thunder (2022) and Guardians of the Galaxy Vol. 3 (2023), as well as The Guardians of the Galaxy Holiday Special (2022).
Title: Nebula (character)
Content:  Nebula has appeared as one of Gamora's followers, 'The Graces'. In this role, she battled Ronan the Accuser alongside Stellaris. Ronan triumphed, severely wounding her.
Title: Nebula (Marvel Cinematic Universe)
Content:  hair, and trained for two months for the role. The character's makeup took approximately four-and-a-half hours to be applied. In early drafts of the film, the character was planned to be killed off by Gamora, but the directors decided to bring her back in the sequel to further explore the relationship between the two. In Guardians of the Galaxy Vol. 2, Nebula is portrayed as a reluctant member of the Guardians. Gillan stated the film would further explore the sisterly relationship between Nebula and Gamora, including their backstory "and what happened to these two girls growing up and actually how awful it was for them and how it has ruined their relationship", adding "we're [also] going to start 
Title: Nebula (Marvel Cinematic Universe)
Content:  The comic book version of Nebula was created by writer Roger Stern and artist John Buscema, and first appeared in The Avengers #257 (July 1985). Marvel Studios President Kevin Feige first mentioned Guardians of the Galaxy as a potential film at the 2010 San Diego Comic-Con International, stating, "There are some obscure titles, too, like Guardians of the Galaxy. I think they've been revamped recently in a fun way in the [comic] book." Feige reiterated that sentiment in a September 2011 issue of Entertainment Weekly, saying, "There's an opportunity to do a big space epic, which Thor sort of hints at, in the cosmic 
Title: Nebula (Marvel Cinematic Universe)
Content:  really clear how far she's come from that angry, bitter and twisted person. She's starting to connect with other people and find some level of forgiveness." Gillan guessed that Nebula would play a prominent role in the film when she realized that Infinity War and Endgame would be adapted from The Infinity Gauntlet, which she had previously read when she was initially cast as Nebula in Guardians of the Galaxy (2014). Gillan shared several scenes with Robert Downey Jr., who portrays Tony Stark, in the film's opening, and the two improvised most of their scenes together. Nebula in the Marvel Cinematic Universe ultimately evolves from a villain to a true hero and a member of the Guardians of 
Title: Nebula (character)
Content:  The rogue scion would be contracted by Kindun, a living conduit to the similarly named planet which he inhabited. To bring her adopted sibling Gamora to him seeking to enact retribution for what she and her father/mentor Thanos did in times long past. Nebula herself would enlist an army of Chitauri in pursuit of the Guardians of the Galaxy to accomplish this task, but ran afoul of the heroic Avengers when she and her forces ended up chasing them all the way to Earth.

Question: who is nebula on guardians of the galaxy?
Answer: Karen Gillan.