Harley Quinn is a super villain in the American DC Comics, whose real name is Harleen Quinzel.She was a psychologist designated to treat The Joker, but was crazy by the Joker's charm of personality and turned into a patient obsessed with him. She believed that she was in love with the him, so she helped the joker to be released from prison and called herself "Harley Quinn." Harley is a violent and elusive recidivist because the joker's cruel and capricious nature makes Harley another victim in some sense, even though she is also a dangerous criminal.