Before Dr. Harleen Quinzel became the notorious Gotham City villain known as Harley Quinn, she was a renowned psychologist who was gifted at getting in the heads of some of Arkham’s most disturbed residents.

Before Dr. Harleen Quinzel became the notorious Gotham City villain known as Harley Quinn, she was a renowned psychologist who was gifted at getting in the heads of some of Arkham’s most disturbed residents.