Nebula is a fictional character in the Marvel Cinematic Universe, portrayed by actress Karen Gillan. She first appears in the 2014 film "Guardians of the Galaxy" and has since appeared in its sequel, "Guardians of the Galaxy Vol. 2," as well as the films "Avengers: Infinity War" and "Avengers: Endgame."
In the MCU, Nebula is a former member of Thanos' army and the adopted daughter of the Mad Titan. She is a skilled warrior and assassin, possessing enhanced strength, agility, and durability due to her cybernetic enhancements.
Throughout the series, Nebula is portrayed as a complex and conflicted character who struggles with her loyalty to Thanos and her relationship with her adoptive sister, Gamora. She is initially introduced as an antagonist in "Guardians of the Galaxy" but later joins the Guardians to fight against her former mentor.
Nebula is known for her fierce determination and her desire to prove herself as a capable warrior. She has a contentious relationship with Gamora, who she views as her rival, but the two eventually reconcile and work together to defeat Thanos.
In "Avengers: Infinity War" and "Avengers: Endgame," Nebula plays a significant role in the plot as she works alongside the Avengers to prevent Thanos from obtaining the Infinity Stones. Her character undergoes further development as she confronts her past and comes to terms with her relationships with Gamora and her adoptive father.
Overall, Nebula is a complex and dynamic character in the Guardians of the Galaxy franchise, known for her strength, determination, and conflicted loyalties.