Jeri is a nightclub owner and runs a band inspired by the Maniax.
Jeri runs a nightclub in Gotham City and is in charge of a band devoted to the Maniax - a group that had terrorised the city a few months before. Bruce Wayne arrives at the club in order to acquire the location of his parents' killer Patrick Malone. Jeri gives him the information, and later has Jim Gordon attacked by her audience when he attempts to stop Bruce, which leads to Jim arresting her. She is brought to the precinct and although not cooperative at first, she eventually gives Jim the location of Malone's apartment.
- Jeri's character is a nod to The Joker, the most famous adversary of Batman, and possibly his companion, Harley Quinn. She is preceded by Jerome Valeska, whom Jeri devoted her club to.
- Jeri's interrogation by Jim Gordon also seems to be a reference to a scene in the 2008 film The Dark Knight. On the show, Jim Gordon interrogates Jeri and she asks him the time, much like the Joker (portrayed by Heath Ledger) does with Batman (portrayed by Christian Bale) in the film.
- Female versions of the Joker have appeared in the comics, although in parallel universes. This includes Bianca Steepleschase who resided on Earth-37 and appeared in Thrillkiller from 1997 to 1998.