Mezo Shoji grew up in a place where prejudice against heteromorphs, people whose Mutant-type Quirks permanently affect their outer appearances, still exists. Because of this, many people were afraid of how Mezo looked to the point where he grew up accustomed to being feared, berating his "dirty blood", and that no matter how society would progress, they would never accept a monster like him.[1][2] He was even beaten whenever he interacted with others, and suffered permanent scarring on his face