Unlike most major comic characters, Harley Quinn did not debut in a comic book. She was created by Paul Dini and Bruce Timm for the 1992 episode "Joker's Favor" of .
: Before her descent into madness, she was Dr. Harleen Quinzel, a promising psychiatrist at Arkham Asylum. Harley Quinn
Harley’s character arc is defined by her journey away from the Joker's toxic influence toward becoming an independent anti-hero. Harley Quinn: A Quinntessential Crash Course - GateCrashers Unlike most major comic characters, Harley Quinn did
: Assigned to treat the Joker, she instead became obsessed with him. He manipulated her into helping him escape, leading to her transformation into the jester-themed villain, Harley Quinn. Harleen Quinzel, a promising psychiatrist at Arkham Asylum
: This definitive origin story was established in the 1994 graphic novel The Batman Adventures: Mad Love , which won Eisner and Harvey awards. Evolution and Independence