Nebula

Nebula is an antagonist (later anti-hero) in the Guardians of the Galaxy films. She and Kraglin had two children, naming them Kyle and Natalia.

History
As a young girl, Nebula and Gamora were forced to fight in combat. However, both girls didn't know what they were doing to one another, and Nebula's father turned her into a monster, and made her cybernetic in order to be like Gamora's equal, but Gamora kept getting better at it.

Personality
Nebula became a sympathetic character in Guardians of the Galaxy Vol. 2, where it was revealed she became a damaged woman due to her sister beating her at almost anything and her father ripping out her brain and her eye from her head. She has matured more due to becoming a mother.