A 9-day conflict with his own clones he created with his quirk left him unsure if he was the original or not. Jin suffers more heavily from what seems to be otherwise specified dissociative disorder (OSDD): while masked, Twice contradicts himself and acts completely natural about it, but without his mask his split personalities argue with each other. He would go into a panic and feel like he was going to "split" until he put his mask back on and become "whole".