Number Five

The only member of the Umbrella Academy to still go by their number, Five disappeared soon after the team made its first public appearance. He had used his ability to manipulate space-time to travel to a postapocalyptic future, where he remained stranded for decades until he was recruited as a Temps Commission assassin. He disobeyed their orders and attempted to prevent the apocalypse, but the unstable time travel led to him appearing in his teenage body. That doesn't stop him from spending plenty of time drinking and belittling his siblings.