Hush (Arkhamverse)

Hush is a character that is referenced in Batman: Arkham Asylum and appears in Batman: Arkham City.

Batman: Arkham Asylum
Although Hush doesn't appear in the game, Doctor Thomas Elliot's night shifts appear on a duty roster hanging on the wall of the Surgery Room. Scanning his shift on the roster unlocks his bio. The duty roster confirms that he was recently treating The Mad Hatter and Firefly.

Batman: Arkham City
Hush has his own side quest where he kills his victims before removing their faces, and wrapping their heads in bandages. When Batman tracks Hush to his hideout, it is revealed he surgically altered his face to look like Bruce Wayne. He ends up escaping, with Batman commenting he will track Hush down the next night.

This incarnation of Hush is similar to Jane Doe where he removes his victim's faces to graft a new one of his own, rather than using plastic surgery.