Jason Todd (Earth 9514)

Jason Todd is a former orphan that was adopted by Bruce Wayne and served as Robin for a few years until the crazed criminal known as the Joker put him into a coma. Eventually, Ra's Al Ghul resurrected Jason and molded him into the Arkham Knight to lead a crusade against the Joker and Batman, but when Jason confronted Bruce, he couldn't bring himself to hurt the man. After that, Jason became the Red Hood and after the retirement of his adopted brother Dick Grayson, became the next Batman. But Jason's tenure as Batman was shorter than Dick's due to having been beaten by a dying Joker and just couldn't take the war anymore and just retired.