Dr. Harleen Quinzel is the extroverted Harley Quinn™, DC Comics' slightly deranged, somewhat psychotic Psychiatrist. Lover and accomplice of The Joker™ (Batman's™ arch-nemesis), Harley first teamed up with the Joker after meeting him at the Arkham Asylum, where he was a patient. When she isn't working her evil with the smiling assassin, Ms. Quinn is weaving trouble with friends Poison Ivy™ and Catwoman™, The Gotham City Sirens.