Dr. Harleen Quinzel is a psychotherapist at Arkham Asylum, having earned the prestigious position after graduating top of her class from Gotham State University. She is deeply empathetic and compassionate, and dedicated to the belief that no one is beyond redemption and everyone has some good in them. As she has recently been assigned to the Joker's case, this belief is liable to be sorely tested. Harleen is fun-loving and cheerful, but tries to put on a professional air, at least at work.