Character appearing in American comic books published by DC Comics. Quinn was created by Paul Dini and Bruce Timm as a comic relief henchwoman for the supervillain Joker in Batman: The Animated Series, and debuted in its 22nd episode, "Joker's Favor", on September 11, 1992.
Quinn's origin story features her as a former psychiatrist at Gotham City's Arkham Asylum named Dr. Harleen Quinzel who fell in love with the Joker, her patient, eventually becoming his accomplice and lover.