what is the story behind the joker and harley quinn
Harley Quinn is the frequent accomplice and lover of the Joker, whom she met while working as a psychologist at Gotham City's Arkham Asylum, where the Joker was a patient. Her name is a play on the name "Harlequin", a character which originated in the commedia dell'arte. The character has occasionally been depicted as an antihero, and she has teamed up with fellow villains Catwoman and Poison Ivy, the latter serving as Quinn's close friend, recurring ally, and romantic interest. Harley Quinn has also been depicted as a member of the Suicide Squad.