Harley Quinn (aka Dr. Harleen Quinzel), is the titular main protagonist of the animated Harley Quinn franchise.

Harley is the former girlfriend and sidekick of The Joker and is currently dating her best friend Poison Ivy. Since breaking up with Joker, she has led and founded a ragtag crew of villainous misfits and briefly became a member of the Legion of Doom. At the end of season 3, Harley realizes she does not feel like a villain anymore and decides to join the Bat Family as a crimefighter.