Jongleur was a member of the Cult of Jerome, and became it’s leader after Jerome Valeska’s death, before Jeremiah Valeska assumes control of the cult. Jongelur led an attack on the Gotham City Police Department, and was captured by Jim Gordon and Harvey Bullock. He was subsequently captured byOswald Cobblepot and Butch Gilzean hoping to use him as leverage against Jeremiah. Instead, Jeremiah blew him up with a grenade launcher.
- Jongleur shares his name with a minor antagonist from DC comics, who is also a member of the Superior Five: a group of villains who are the counterparts to a superhero parody group called The Inferior Five.