Harleen Quinzel (Earth-1)

Harley Quinn is one of the members of Batman's rogues gallery.

The Maid of Mischief
In her early years as the Harley Quinn persona, she was a devoted partner of notorious criminal, the Joker, which made her an enemy of Batman. She was at one point defeated by Batman, and imprisoned in Arkham Asylum.

Breaking Out Of Arkham
Partnering up with Mister Freeze and Firefly, the trio decided to launch a mass breakout of Arkham. Their first task was to release Killer Croc from his cell, and then all hell broke loose, with the likes of the Riddler, Scarecrow, Two-Face, Poison Ivy and Kite Man joining in the breakout.

Related

 * Appearances of Harleen Quinzel
 * Images of Harleen Quinzel