Harley Quinn
- From: DC Comics/Warner Bros. Animation
Harley Quinn was actually not a comic book invention. She was first used in the 1990s Batman: The Animated Series television show. Due to her massive popularity on the show, DC Comics began adding her to several comic books afterward. Her backstory is slightly tragic. She was once a psychiatrist at Arkham Asylum, where she met The Joker. She fell in love with The Clown Prince of Crime, and helped him escape. Quinn would go with him, and depending on the origin you like most, he essentially made her insane. Whether it was through electroshock or falling into some acid. Harley became infatuated with Joker, ignoring how horrible he was.
Their romance was relatively one-sided, as Joker was always incredibly abusive to Harley. He also did not mind leaving her behind on crime sprees to take the fall. Eventually, she had enough and left Joker to venture out on her own. That led to her own crime issues, but Harley was not a psychopath like Joker. She actually cared for others, and wanted to help. Her crimes would land her on the Suicide Squad, a team of criminals led by Amanda Waller that are sent on suicidal missions. Should they survive, their sentences will be reduced. Harley did go out on her own beyond this. The entire time, she had no problem ending lives by any means necessary.