Dr. Harlin Francis Quinzel worked as a forensic psychologist in a psychiatric hospital Arkham in Gotham city. Quinzel became the first victim of the Joker. in the end, Quinzel start to go crazy her actions led to the rescue of the Joker and its connection to his criminal activities under the alias Harley Quinn.
"Harlin Kvinzel was a born and gymnast, earning an athletic scholarship, entered the University. She was interested in prestigious diploma psychiatrist, but strain tuition she was not going to — instead girl seduced teachers under whose subjects did not have time. Harlin had planned to become a popular psychologist with his own series of books and went to work in "Arkham" to make a name for themselves on the toughest cases with homicidal maniacs. After three months of persuasion leadership enabled it to conduct sessions with the Joker, which made her fall in love with yourself. When the villain escaped and returned it to Batman in "Arkham", she wore Alechinsky suit, beloved rescued from a mental hospital and became his assistant.
Her behavior became even more erratic and hysterical before. It seems that the soul of the girl, there are some drastic changes. Incidentally, this was reflected in her wardrobe – now Harley is dressed brightly and aggressive.
Harley Quinn helped Joker in his crimes while remaining very naive. Although she has a friendly relationship with poison Ivy.