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), Thor: Love and Thunder (2022) and The Guardians of the Galaxy Holiday Special (2022) in addition to voicing alternate timeline versions in the Disney+ animated series What If...? (2021). Publication history Nebula was created by writer Roger Stern and artist John Buscema, and first appeared in The Avengers #257 (July 1985). Fictional character biography A brutal space pirate and mercenary, Nebula seized control of Sanctuary II, a massive spaceship previously under the command of Thanos. Thanos was believed to be dead at this point, and Nebula claimed that he had been her grandfather. Nebula's band of mercenaries and pirates consisted of Skunge, Kehl, Gunthar and Levan. Nebula asked the second Captain Marvel to join her mercenary band and aid them in conquering the Skrull Empire, but she only pretended to go along with her plan. However, Firelord learned that Nebula had massacred the Xandarians. Eventually Nebula used her space fleet to attack the Skrull space armada and the Avengers. Nebula then schemed to gain absolute power by using Earth scientist Dr. Harker's atomic compressor to release vast amounts of energy that were absorbed by the Infinity Union. This attempt nearly triggered the end of the universe when the experiment caused a second Big Bang that came close to annihilating everything before a small group of Avengers Captain America, Iron Man, Thor, Spider-Man and Sersi were able to escape the destruction and shut down the equipment in time to negate the unmaking of existence. She fought the Avengers, absorbing energies from the Infinity Union through the implant in her brain until Sersi removed the brain implant, depriving her of her powers. Nebula then escaped. The Infinity Gauntlet The newly resurrected Thanos was offended by Nebula's claims of kinship. He reclaimed his ship and almost killed her, using the Infinity Gems. He