Black Mask

Roman Sionis, better known as his underworld persona Black Mask, is one of the main crime bosses of Gotham City and one of the wealthiest. He is known as the greatest criminal strategist out of all of Gotham's gangs. His great control of organized crime has led to his alignment with Carmine Falcone and Penguin in which they have drug shipments coming in through Gotham shipments.

Despite his wealth and power, his fear goes towards The Joker, who was responsible for the overtaking of his fame and half of his gang left him for The Joker. Sionis and Joker have since been at war.

Roman Sionis was born into a wealthy family. His parents were socialites and were more preoccupied with their social standings than anything else in their life. They hid their imperfections and embarrassments from their wealthy friends and acquaintances, such as Roman being dropped on his head as a baby by the doctor, or that Roman was attacked by a raccoon on their own estate, stuff like that.

As he grew older, he fell in love with a woman named Circe, however his parents disapproved of the relationship, forcing Roman to break up with her. This lead Roman to burn and kill his parents in a fire. He then inherited their fortune and company, Janus Cosmetics. However Roman ran the company into the ground, causing a buyout from Wayne Enterprises, which caused Roman to snap and develop a hatred for Bruce Wayne.

He went to his father's crypt and carved a skeleton mask out of it. He then grabbed a few things from his home like a gun, some cash and his full collection of masks. He then made his debut as Gotham's newest crime boss, Black Mask.