The Red Hood otherwise known as Jason Peter Todd (real name) is the former titular secondary antagonist of Batman: Arkham Knight. He's the second Robin and was previously Batman's partner. After being kidnapped and tortured by The Joker, he was turned into becoming the Arkham Knight and lead a military takeover of Gotham City in hopes of punishing Batman for not avenging/saving him. He eventually redeemed himself and decided to replace Batman as the sole protector of Gotham City under the guise of the Red Hood and serves as the titular anti-heroic protagonist of the game's DLC Red Hood Story Pack.