Richard Sionis

Richard Sionis is the main antagonist of The Gotham episode "The Mask." A rich businessman who owed Sionis industries, before hiring any new employees, he forced them to take part in a fight in an abandoned building, all for his own entertainment. The last man standing would get the job. Though it didn't have to be to the death, he cared nothing if it was and at least four people died in his previous fights.

History
One of the bodies, from his previous fights washed up on the docks. Upon investigating, Nygma found the victim had bitten off his attackers thumb, this led to Jim Gordon and Harvey Bullock investigating. Going to Sionis industries, they noticed all his employee's had scars or cuts.

Confronting Richard himself, he gave a talk romanticizing combat and bloodshed itself and how he believed it took a similar killer instinct to achieve in business, something which Jim Gordon (himself a war veteran) was not impressed with.

Later while investigating one of the buildings where he supposedly had fights, Richard's goons got the drop on Gordon and captured him. Interested in seeing the fire in Gordon, Richard set three potential candidates against him promising them the job and a million dollars bonus for killing Gordon.

However Gordon managed to beat them, Richard himself attacked armed with a Katana, but was no match for Gordon. He was defeated, and he and his employee's were imprisoned.

Trivia

 * Its presumed that he is the father of Roman Sionis, the future Black Mask.