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Harley Quinn (Dr. Harleen Quinzel) is a fictional character, a super villainess in the DC Comics universe. Created by Paul Dini and Bruce Timm, she first appeared in Batman: The Animated Series in 1992. Later appearing in DC Comics The Batman Adventures #12 in 1993. Dr. Quinzel had been working as a psychiatrist at Arkham Asylum where she was assigned to the Joker and fell in love with him. This led to her adopting her adopting her own costume persona and teaming with the Joker to cause further mayhem. Clad in the manner of a traditional harlequin jester. Frequent accomplice and girlfriend of Batman's nemesis the Joker, she is also close to Poison Ivy, from whom she gained her immunity to poisons and toxins. Her abilities include an enhanced physiology due to chemical experimentation, giving her increased strength, agility and durability. She has been a member of the Secret Society of Super-Villains, the Secret Six and the Gotham City Sirens.
Harley Quinn by Carlos d'Anda #HarleyQuinn #DC
Harley Quinn ConceptArt from Batman Arkham City
Harley Quinn Concept Art from Batman: Arkham City