According to TV Line's official character description, this version of Firefly is "enslaved by her brothers, a notorious gang of arsonists... Bridgit Pike is forced into the family business. When she catches the eye of Selina Kyle, the young Cat Woman and the soon-to-be-Firefly team up to put Bridgit's firestarting skills to good use. But after a deadly encounter with the Pike Brothers, the meek Cinderella is transformed into a vengeful supervillain, hell bent on destroying those who have wronged her."
Veintimilla's Firefly will appear in episodes five and six. The actress is best known for her role as a younger version of Chita Rivera's character in Broadway's "The Visit."
In the comics, there are two versions of Firefly: Garfield Lynns, who first appeared in France Herron and Dick Sprang's "Detective Comics" #184, and Ted Carson, who debuted in Bill Finger and Sheldon Moldoff's "Batman" #126. Both versions are notably male and primarily use pyrotechnics and explosives as weapons.