Used to be a psychiatrist for Arkham Asylum, but Joker manipulated her into becoming a villain. Joker abused her heavily when they were in a relationship. Eventually left him. Joker impregnated her once, she kept it a secret from him, their daughter is Lucy Quinzel. Eventually marries Poison Ivy. Acts very immature. Has histrionic personality disorder. Slowly becomes more vigilante. Has two hyenas, Bud and Lou. Bisexual. Can be very violent when she wants to be. Lives with the Batfam. Loves séx.