Johnny Sabatino was born and raised in Gotham City, where he became an infamous mobster, eventually starting to work for Tommy Elliot as a money launderer and being appointed as the manager of a nightclub the latter owned, the Lookout.
After Tommy was arrested and sent to Arkham, Sabatino was entrusted with Lucius Fox's journal and kept it in a vault inside his office at the Lookout. Few months later, he was informed by Tommy that Batwoman could try to steal it that evening, prompting him to set her a trap catching both the vigilante and Julia Pennyworth. Later he organized an auction inviting all of Gotham's criminal families using Batwoman's head as the prize. Later, as Tommy called him asking for the diary, Sabatino betrayed him telling him that he had no intention to give it to him since his bank account was frozen while the journal was likely more valuable than he let him know. Later at the auction, he sold some of Batwoman's weapons to his fellow mobsters and, after Mary Hamilton arrived stating that she intended to buy the Batsuit for Hamilton Dynamics, he replied that she can have it after they kill the vigilante, prompting the girl to cause a blackout with Luke's help and freeing Batwoman, who then knocked out Sabatino, which was subsequently arrested and sent to Blackgate.
Sabatino was shown to be cold and business like. Despite being trusted by Tommy Elliot betrayed him once he realized how valuable Lucius Fox's journal was. Once he captured Batwoman he realized the best way to make money out of it, was by auctioning her gadgets, suit and her very life to the highest bidder.
He seemed to be all business as he did not speak to Batwoman nor unmask her, despite having a lot of opportunities to do so.
- High-level intellect/Expert tactician/Leader: When learning that Batwoman would break in Lookout he set traps that snared both her and her accomplice, successfully predicting and countering their plan. A rare feat considering Batwoman managed to dominate most criminals with ease.
Behind the scenes
- In the DC comics, Johnny Sabatino is the husband of Peyton Riley after an arranged and loveless marriage orchestrated by her father, however he got tired of the woman and tried to murder her, leading Peyton to became the second Ventriloquist.