Gotham Underground

Gotham Underground is a crime drama action comic book series that is set in an alternate universe version of the main DC universe. Underground is under DC's mature label, meaning it features heavy violence, drug use/references, and more.

Main

 * The Joker - the most famous and most well-known criminal in all of Gotham.
 * Oswald Cobblepot/Penguin - the head of the Cobbelpot crime family.
 * Harvey Dent/Two-Face - the former District Attorney who had acid thrown in his face.
 * Selina Kyle/Catwoman - a cat burglar who steals mostly for the thrill.

Recurring

 * Bruce Wayne/Batman - the dark knight of Gotham City who is the criminal's biggest threat despite not appear very often.
 * Commissioner James Gordon - the head of the Gotham City Police Department.
 * Detective Harvey Bullock - a member of the GCPD who, despite his aggressive nature, wants Gotham to be a better place.
 * Harleen Quinzel/Harley Quinn - Joker's moll who is a former psychiatrist at Arkham Asylum.
 * Victor Zsasz - Cobblepot's bodyguard and an infamous serial killer.
 * Wilkins - Two-Face's butler.
 * Rupert Thorne - a mob boss who employes Catwoman for a job.
 * Carmine Falcone - the head of the Falcone Crime family.
 * Waylon Jones/Killer Croc - the king of the sewers.
 * Matthew Thorne/Crime Doctor - Rupert’s brother and a doctor for criminals.
 * Jonathan Crane/Scarecrow - a former doctor at Arkham Asylum who uses "Fear Toxin" to cause massive amounts of terror in people.
 * Edward Nygma/Riddler - one of the smartest criminals alive who is obsessed with riddles.
 * Pamela Isley/Poison Ivy - an eco-terrorist who has the ability to control plants and brainwash people using pheromones.
 * Jervis Tech/Mad Hatter - an insane man obsessed with Alice in Wonderland.
 * Victor Fries/Mister Freeze - a scientist who can't live outside of sub-zero temperature.
 * Bane - one of the largest and strongest men alive who is addicted to the drug Venom.
 * Basil Karlo/Clayface - a shapeshifting former actor.
 * Thomas Blake/Catman - a murderous cat-themed criminal.
 * Garfield Lynns/Firefly - a pyromaniac and assassin.
 * Arnold Wesker/Ventriloquist - a meek and shy criminal.
 * Scarface - Arnold's gangster puppet who seems to be a split personality of his.
 * Roman Sionis/Black Mask - one of the top mob bosses in Gotham.