Selina Kyle

Selina Kyle, otherwise known by her persona as Catwoman, is one of the three original vigilantes of Gotham, alongside Bruce Wayne/Batman and Dinah Drake/Black Canary. She is also the themither of Felix Kyle, though she prefers the term mother.
Originally a Black Widow, Selina grew up in the Red Room before eventually escaping before the graduation ceremony could be performed on her. Before she met Bruce, it is known that she was raped by an alpha, and aborted the resulting pregnancy. When she became pregnant with Felix, however, though she stole abortion pills once more, she decided to keep him, leading him to be born in March of 1996. During her time at the Red Room, Selina also met the Winter Soldier, otherwise known as Rebecca 'Bucky' Barnes.
Stealing was something that Selina excelled at. Becoming a thief, which was the original purpose of her name, she met Bruce a couple of times shortly before the Riddler incident, with them fighting each time. But Bruce recruited her to fight the Riddler, and they eventually became something more than partners: family. Bruce and his husband, Tony Stark, eventually became honorary uncles to her son (and an honorary brother to her, in Bruce's case), and she an aunt to their children.