Black Mask is one of the non-playable characters in LEGO Dimensions 2: The Rise of Enoch, from the DC Comics franchise.
Roman Sionis was a businessman and owner of Sionis Mills running a cosmetics company until he made a mistake which cost him the business to Bruce Wayne. With a newfound hatred of Wayne, Sionis carved a mask from his father's black coffin and turned to crime as the Black Mask. Roman set his family's mansion on fire to burn all ties to his past life, which also burned the mask he used to conceal his identity from Batman onto his skin. Black Mask started a gang known as the False Faces and became a leader of the Gotham City underworld with a hatred of both Bruce Wayne and Batman.