Joker

Alter ego: Jack Napier

Species: Human

Place of Origin: Gotham City

Team Affiliations: Injustice League, Legion of Doom, Injustice Gang

Partnerships: Harley Quinn, The Penguin (Oswald Cobblepot), Two-Face (Harvey Dent), Scarecrow (Jonathan Crane)

Notable Aliases: Red Hood

Abilities: Criminal mastermind; Expert chemist; Utilizes weaponized props and toxins