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"Friends, brothers, men of Gotham. I have funded you. I've protected you. I scratched your backs and kept you outta jail. Well, now it's time to say thank you. Go show those little bitches you don't mess with Roman Sionis!"
―Black Mask[src]

Roman Beauvais Sionis was a nightclub owner in Gotham City, who ran criminal activities under the alias Black Mask. During his time as a mobster, Sionis befriended Victor Zsasz, saved Dinah Lance from the streets, and formed a rivalry with the Joker. Sionis planned to get the Bertinelli diamond to get a lot of money, but when Cassandra Cain stole the diamond, he threatened Harley Quinn and several criminals to get Cain, after several failures, Sionis took matters into his own hands and tried to kill Cain to obtain the diamond, however, he was killed by a grenade from Quinn and Cain.


Early Life[]

"Family is an illusion! Do you know what my family gave me? Nothing! I know what everyone says, "here comes Roman Sionis, he was handed life on a silver spoon, gin and tonics at five, I'll have the duck!" Blah blah blah. Fake! But, look at me now."
―Roman Sionis to Mr. Keo[src]

Roman Sionis came from the wealthy Sionis family, whose name is plastered on "about half the schools and hospitals in Gotham." While Roman himself claimed that he wasn't born into privilege and had to work for everything he has, the fact that he was cut off by his family due to excessive spending and poor business sense says that Roman is likely not the most unbiased narrator of his own life.

Growing up, Sionis began working in his father's industry, Janus Corporation, where he hated working, until he had a fight with his father, which led to him being fired from the company, and he felt resentment towards his father, so to regain his respect, he decided to form his own criminal organization.[1]

Criminal Empire[]

Bertinelli Massacre[]

"I hate to be the one to break it to you, sweetheart, but you are not done. Who do you think funded Galante's little power grab, huh? Galante was working with Sionis. Roman killed your whole family looking for that rock."
Renee Montoya to Huntress[src]

Sionis formed his organization, where he kept several criminals protected, and opened a nightclub called Black Mask Club, where men and women could vent their sorrows. He also recruited Victor Zsasz, a psychopathic murderer, whom he saw as his best friend, and put him as his right-hand man in his crimes.

In 2005, Sionis met with Stefano Galante and his mafia, so they joined forces to try to get a diamond that had all the Bertinelli Crime Family's bank keys. Sionis sent Zsasz with Galante and they massacred the entire crime family. However, Helena Bertinelli survived, and she began training her for revenge. Some time later, he traveled to various places, where he obtained several masks, and took a dark one to take the nickname "Black Mask".[1]

Saving Dinah Lance[]

"Do you know who you're working for?"
"Damn right, I do. He's the man who gave me a job, took me off the streets."
Renee Montoya and Dinah Lance[src]

Sionis met Dinah Lance, a young woman with sonic screaming powers who lost her mother, and was left alone on the streets, so he rescued her, and gave her a job singing at his club, and would keep her safe, in exchange. Lance sang for the guests to survive, earning her reluctant loyalty. Sionis started calling her his "little bird", thanks to her alias Black Canary.[1]

Rivalry with the Joker[]

"Will your paramour be joining us this evening?"
"Not tonight, Romy. Not tonight."
―Roman Sionis and Harley Quinn[src]

Sionis confronted the Joker, and they became criminal rivals. As part of their rivalry, Sionis learned that one of his assistants, Happy, was tortured by the Joker. However, he received visits from his lover, Harley Quinn, in his club, but while he came to deeply loathe her for being every bit as malevolent as he was and hence a worthy threat, he did not initially harm her significantly because he feared her lover, the Joker, and Harley teased him with all sorts of things to get on his nerves.[1]

Manhunt of the Birds of Prey[]

Learning about the Bertenelli Diamond[]

While Harley Quinn was celebrating her newfound emancipation from the Joker, Roman was looking to bring more Gotham crime families into the fold. He proposed a merger with the Golden Lions but was turned down by their leader, Mr. Keo, who refused on the basis that the Lions are a family business, and have been for nearly a century. This infuriated Roman, who went off on a tirade about how his own family supposedly never did anything for him, and how he hadn't had the world handed to him "on a silver spoon" as most people believed. Though Mr. Keo remained unswayed, Roman asked him to sleep on it and meet him again in two days to revisit the matter.

Later that night, after Harley broke his driver's legs, he ordered Zsasz to find him a new one. He and Harley also shared a tense moment where Harley admitted she knows Roman understandably detests her, and thanked him for "firing" his now-useless driver on her behalf. It only served to deepen his disdain for her and fuel his later decision to have her rounded up and shipped back to him once he learned she was no longer under the Joker's protection.

In the early hours of the morning, he watched from his penthouse while Dinah Lance saved an inebriated Harley from being abducted by two men. After getting a good look at her fighting skills, he ordered Zsasz to go promote her from his singer to his driver.

Black Mask with the Keos

Sionis prepares to execute his victims

When his deal with Mr. Keo fell through, he rounded up Keo, his wife, and their daughter, and expressed disappointment at his choice not to join him. Shushing his sobbing wife and daughter, he told Keo that he'd hoped they could be family and thought he'd given him a great pitch. He had Zsasz peel off his face and slit Mrs. Keo's throat, after which Zsasz asked him what they should do about the Keo family's daughter. While initially, Roman figured the first two bodies were enough to send a proper message, he changed his tune once he realized the daughter blew a snot bubble while thanking him for his mercy. Disgusted, he went back on his word and ordered Zsasz to peel her face off as well, tossing away his gloves before dancing out of the warehouse, where Dinah waited as his getaway driver.

The next morning, he shared breakfast with Zsasz, who told him that yet another gang had capitulated to them afterword of the Keo family's murder got around. He also shared the news of the Crossbow Killer's newest victims, Rossi and four other members of his crew. The news upset Roman, who had to be soothed with a shoulder massage from Zsasz until Dinah arrived for her morning assignment. Though Zsasz wanted to send her away because she was late, Roman refused and began to show off a vast array of his personal belongings, including a Chokwe mask from his time in Congo-Kinshasa, a pair of shrunken heads from the Shuar of Ecuador, a series of acupuncture models unburied from the mountains in an unknown location, and a large statue of himself.

After learning from Zsasz that Harley Quinn and the Joker broke up, he ordered Zsasz to have his men find her and bring her to him. He also told Dinah to go pick him up the newly located Bertinelli diamond, urging her to bring Zsasz with her on the way. This would turn out to be a mistake, as Zsasz would later have the diamond pickpocketed from him by Cassandra Cain.[1]

Confrontation with Harley[]

"I wanna kill you. Because without the Joker around... I can. For all your noise and bluster, you're just a.. a silly little girl, with no one around to protect her."
―Black Mask[src]

Infuriated by the news, Roman could only be comforted by Zsasz, who informed him that his men had brought Harley to the club. Zsasz suggested they go "blow off a little steam" by torturing her to death. Temporarily satisfied, Roman agreed, and he and Zsasz left Dinah so they could go and confront Harley.

Roman Sionis Grievances

The reasons Sionis has to kill Harley.

Roman asked her if she knew why he wanted to kill her, and, while she wasn't certain, she did have an idea, listing grievances such as her gender, political ideology, two condescending nicknames, allegedly singular incident of interrupting, among many other grievances some much more violent and concerning in nature than the ones she had been accountable enough. Each of his attempts at setting a frightening, villainous atmosphere were thwarted by a quick-talking Harley, who pleaded with him not to spout out a cliche monologue about why she was there and what he was intending to do to her. She also insinuated that the reason he wanted the Bertinelli fortune so badly was to restore his father's respect in him, albeit the attempt was, according to her, misguided.

Roman, on the other hand, insisted he wanted to kill her just "because I can." He sat down with a bowl of popcorn prepared by one of his cronies and prepared to watch Zsasz torture her, only to pause when she revealed that she overheard him talking about his lost diamond, and offered to get it back. Though skeptical, Roman agreed, giving her until midnight. If she didn't have it by then, he told her he intended to peel off her face and pickle it.[1]

Betrayed by Harley and Attack on Erika[]

Once he let Harley go, he instructed Zsasz to set a $500,000 bounty on Cassandra's head, making both her and Harley into the two biggest targets in Gotham City. Dinah, who had been Renee's informant for some time, quickly called her from the bathroom of Roman's club to inform her that there was a price on Cain's head. Assassin after assassin went after the pair, only to be killed and countered at every turn.

After being informed that they'd escaped capture, Roman became violently angry, a mood exacerbated by the loud laughter of one of the nearby patrons of his club. Though it was simply an ill-timed reaction to a joke told by one of her friends, Zsasz told Roman that the woman, Erika, was indeed laughing at him. In response, Roman ordered her onto the table, where he forced her to dance for him. Calling her dress "fucking hideous," he ordered one of her friends to cut it off of her with a steak knife, delighting in her obvious distress. He then stopped Dinah from leaving the club, first asking her to reassure him that she would never betray him, then making her dance with him.[1]



Black Mask giving a speech to his minions outside of The Booby Trap

"He's after all of us. The kid just robbed him, you betrayed him, you killed his BFF, and you're dumb enough to be building a case against him."
―Harley Quinn regarding the Black Mask[src]

Things came to a head as Harley Quinn took Cain to The Booby Trap intending to turn her over to Victor Zsasz. Black Canary was ordered to drive Zsasz there and in the process betrayed Black Mask by warning the detective Renee Montoya of what was coming. Rather than leave things simply to Zsasz, Black Mask assembled a small army, headed by himself, and upon their arrival, the battle began. Harley Quinn convinced Renee Montoya, Dinah Lance, Cassandra Cain, and the Huntress, newly joined to their group, that they needed to work together if they were to have any chance of defeating the forces aligned against them.

In a fierce fight, they battled through the Black Mask's forces but found the Black Mask waiting for them, now in full costume. He and his minions managed to capture Cassandra Cain and a chase ensued. Things came ahead at the Founders Pier, wherein a final confrontation, Black Mask met his match. While Quinn was fighting him, Cassandra Cain planted a grenade on his person. Quinn then kicked him off the pier and the grenade exploded, killing him and sending his remains into the watery depths.[1]


"Sionis is gone, but it's just a matter of time before some other asshole tries to finish what he started."
Renee Montoya to Dinah Lance and Helena Bertinelli[src]

Following his death, the Gotham City Police Department captured all of the bounty hunters and members of his criminal organization, with Patrick Erickson taking the credit. Renee Montoya, Dinah Lance and Helena Bertinelli knew that someone much worse than Sionis could appear, so they decided to found a fighting-crime group known as the Birds of Prey.[1]


"I agitate his already delicate sense of mental equilibrium, that and his obsessive-compulsive need to be the center of attention."
Harley Quinn[src]

Said to be an absolute narcissist and a homicidal psychopath. He was also highly ambitious, power-hungry, sadistic, and emotionally unstable. He was highly misogynistic and seemed to see women mainly as objects for his use and amusement. He reveled in violence, and could easily lose his temper when things didn't go his way. However, he appeared to care for both his right-hand man and best friend Victor Zsasz as well as his new driver and bodyguard, Dinah Lance, who he appeared to have some level of attraction towards. Still, he was ultimately a remorseless and chaotically malevolent psychopath, showing signs of unspeakable depravity.

He also had a childish way to see things. He used to say that the Bertinelli diamond was of his "property" only because he wanted and was searching for it. Despite this he was capable of acting sophisticated to maintain a public image of a wealthy businessman at the eyes of Gotham City and seemed to show good manners with criminals more powerful and dangerous than him, acting respectfully toward Harley after she crushed his chauffer's legs due to him believing she was still being the Joker's girlfriend and tried to smooth the air by giving all his clients a free round of drinks, however once he learned Harley broke up with the Joker his respect for her vanished and didn't hesitate on threatening with killing her.


  • Gifted intelligence: Sionis was an intelligent individual, being described by Munroe as a "mastermind." He managed his nightclub while running his criminal organization from behind the scenes, even able to avoid the authorities with a lack of any evidence of his criminal activities.
    • Master tactician: Sionis was able to avoid the authorities with a lack of any evidence of his criminal deeds. He was able to throw off Harley from his vehicle by telling his driver to hit the breaks and successfully trick Harley Quinn into shooting her last bullet at a statute thinking it was him.
    • Master leader: Sionis efficiently led his criminal organization both from behind the scenes and directly.
    • Expert businessman: Sionis efficiently managed his businesses, the Janus Corporation, and his nightclub.
    • Expert interrogator: Sionis uses Victor Zsasz many times as an executioner for his murders and torture, obtaining the information he wants through sadistic techniques.
Black Mask shot Renee Montoya

Black Mask with a pistol

  • Expert Marksman: Sionis is experienced at using firearms, mainly, handguns. This seen when he shot Renee Montoya from a distance with his handgun, though she survived due to her bulletproof vest. He was able to accurately aimed at Harley's location on his car roof despite not having a visual of her, and would have killed her if it wasn't for Cassandra's interference.
  • Combatant: Sionis has some proficiency in hand-to-hand combat. Mainly, when he overpowered Cassandra Cain when she wrestled his gun away, but he rarely does fight in battles as he tends to let his men do the fighting.
    • Knife proficiency: Sionis has shown knowledge of using knives during torture and threatening other people, such as when he held Cassandra Cain hostage at knifepoint.
  • Intimidation: Sionis was an intimidating presence. Be it through torture, his violent outbursts, or his infamous mask he struck fear into enemies and allies alike.



  • M1911A1: Sionis carries this handgun with him as his main weapon of choice during his criminal activities as Black Mask, which he used to shoot Renee Montoya.
  • Sage folding knife: Sionis carries this curved knife when threatening Harley Quinn and when he took Cassandra Cain hostage.

Other equipment[]

  • Black skull mask: Black Mask wears this when operating during his criminal activities to disguise his identity.
  • Chokwe mask: Sionis has this mask in his collection.
  • Tsantsa: Sionis has this as an ornament in his living room.
  • Acupuncture Models: Sionis has models of ancient and himself in his collection.






  • Black Mask's grievances with Harley Quinn, according to her, included disabling his chauffeur, pronouncing espresso as "expresso", having a vagina, voting for Bernie Sanders, peeing in his Brita, calling him "Romy", sticking gum under his table, stealing his remote, calling him "Queef Richards", selling a family heirloom, spoiling lots of movies, stealing his limelight, leaving a floater, interrupting him once, not laughing at his joke, forgetting to use a coaster, burping the alphabet, trashing his bathroom, leaving the toilet seat down, puking on his carpet, changing the channel, breaking a window, eating his lunch, crashing his Rolls-Royce, ripping a loud one, causing a ruckus, graffitiing his car and torching his paintings.
  • In a few scenes, it is implied that Sionis and Victor Zsasz are in a relationship together, although Ewan McGregor described the relationship between Sionis and Zsasz as more of a master-pet one.

Behind the Scenes[]


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