Dr.Harleen Quinzel, age 25, works as a psychiatrist at the Arkham Asylum. meets a patient, Kiernan Harker, better known around gotham city as, The Joker. it’s important to note that Dr. Quinzel was no angel, even before meeting The Joker. In fact, Harley is as all too eager. Perhaps to exploit the mental asylum’s patients. She’s hinted to be a conniving opportunist, as she plans to write a tell-all book about the patients to gain fame.