Black Mask is a fictional character in the DC Comics universe, primarily known as a villain in the Batman series. His real name is Roman Sionis, a wealthy Gotham City socialite who becomes a crime lord. Black Mask is notorious for his obsession with masks and his brutal methods, often using fear and violence to control his criminal empire. He is characterized by his distinctive black skull-like mask, which he wears to symbolize his ruthless persona. Black Mask often clashes with Batman and other heroes, making him a significant adversary in the Gotham underworld. His complex background and motivations add depth to his character in the comics.