Harlequin is an character appearing in the webseries Justice League: Gods and Monsters Chronicles. This version resembles Harley Quinn and is an serial killer collecting peoples corpses to make dolls.
Upon kidnapping and mutilating several innocent people, she uses the corpses as various toys, dolls, and mannequins. When Batman arrives to save a victim, he fights and defeats her after she cut herself with an chainsaw. She admits defeat, but ends up getting killed as Batman reveals himself to be a vampire and ends up biting her neck in order to drink her blood.