Fan Casting Dr. Harleen Quinzel in Batman: Arkham Origins

After the Joker, a new criminal mastermind, was arrested by the GCPD, she did a psychiatric evaluation on the mass-murdering psychopath, also holding some sympathy for the Joker due to her belief that the GCPD was bullying homeless people. This led to the Joker to, after ambiguously implying that he came about due to having a really bad day, manipulate her into becoming a pawn inside the prison, which worked largely because she didn't have any friends beforehand. Eventually, she was held hostage by the various prisoners at Blackgate when the Joker escaped and instigated a riot.