Roman Sionis, also known as Black Mask, leads a unnamed criminal organization after he unifies all the gangs in Gotham City. This organization basically leads all of Gotham's organized crime which also primarily comes into conflict with Batman and the Birds of Prey. Roman Sionis also uses the company, Janus Cosmetics, as a front and a base of operations for their illegal criminal activities.
To be added
- Janus Cosmetics: To be added
- Birds of Prey (And The Fantabulous Emancipation of one Harley Quinn) (First appearance)
- In the comics, Roman Sionis, also known as Black Mask, leads the False Face Society, which was an organization of masked henchmen that he selected.
|Media||Batman v Superman: Dawn of Justice | The Batman|
|Characters||Bruce Wayne/The Batman | Alfred Pennyworth | Dick Grayson/Nightwing | Barbara Gordon/Batgirl | James Gordon | Lucius Fox | Thomas Wayne | Martha Wayne | Jason Todd/Robin | Clark Kent/Superman | Diana/Wonder Woman|
|Enemies||Joker | Harley Quinn | Killer Croc | Deadshot | Penguin | Lex Luthor | Deathstroke | Catwoman | Poison Ivy | Jonny Frost | Cesar Santos | Anatoli Knyazev | Joe Chill | Doctor Aesop | Firefly | Black Mask | Victor Zsasz|
|Miscellaneous||Gotham City | Batcave | Arkham Asylum | Wayne Manor | Batmobile | Batsuits | Wayne Enterprises | Bat-Signal | Gotham City Police Department | Aragon Theatre | Batman film series | Ace Chemicals | Glasshouse | Batwing | Wayne Family | Blackgate Penitentiary | Batman Family | Joker's Gang | Wayne Hangar|