Played by Chris Messina, Mr. Zsasz seems like a pretty standard evil henchman to Ewan McGregor's Black Mask in Birds of Prey. However, there's more than meets the eye for this scarred-up, psycho killer. Can't you see? In the comics, Mr. Zsasz is one of Batman's most frustrating foes. While he's never reached the A-list potential of villains like Penguin, Scarecrow, and the Joker, Zsasz is a serial killer who carves a scar in his flesh for every person he's killed. Considering that Batman is generally anti-murder, Zsasz presents a problem that only a batarang and two decades of martial arts training can solve.

While Birds of Prey stays true to Zsasz's self-mutilating habits, they change the character a bit. For starters, he's got a full head of hair, but the film also makes it fairly clear that the DCEU version of Zsasz has a bit of a crush on Black Mask. While the two characters have worked together in the comics, this particular romantic pairing is a new addition to the canon — although considering how well Roman Sionis fills out that velvet suit, you can't really blame Zsasz for catching feelings.