Guest is a psychopath. Guest just recently got sent to a mental hospital for some gruesome murders, it was almost impossible to trace but one of the civilians stumbled upon Guest about to get their next victim and called the heroes and police. The now infamous league of villains heard about Guest being in a mental hospital now and shigaraki wants Guest... He wants them to join the league badly...

So shigaraki set up an elaborate plan to break out Guest and get them to join the league of villains. They laid low for awhile so the heroes wouldn't suspect anything, when the heroes least expected it they busted into the hospital and killed anyone who got into their way. They reached the room at the end of the hospital and opened the door and there they saw Guest... Chained up and laughing at nothing just... Laughing at the white padded walls