Black Mask
Personal information
Real nameRoman Sionis
OccupationProfessional criminal
Based inGotham City
Physical description
Eye colorBrown
Hair colorBrown
Height6 ft 1 in
Weight195 lbs
Real-world information
AppearancesArkham Asylum (referenced only)
Arkham City
Arkham Origins
Arkham Knight
Voice actorNolan North (Arkham City)
Brian Bloom

Following the death of his wealthy parents in a fire, Roman Sionis inherited their fortune and attempted to run their company into the ground. However, this failed when his former childhood friend Bruce Wayne bought the company out. Sionis was filled with a bitter resentment toward Wayne.

Harboring an obsession with masks – symbolic and otherwise –, Sionis carved one from his father's black coffin and sought revenge on Wayne. This put him into conflict with Batman, and their battle eventually led to Sionis' mask being burned into his skin, remaking him Black Mask. He now operates as feared gang leader and one of the most powerful mob bosses in Gotham City, with an extreme hatred for Batman.