very twisted, malevolent, and warped personality, He doesn't care for his or almost anyone else's life, having no qualms about performing evil deeds like murdering innocent people.Shigaraki's quirk is known simply as 'decay'. As the name implies, it is a quirk that allows its user to decay or destroy anything that they lay their hands on. he is from the MHA fandom..shigaraki was my brother though I ran away and changed my name and dyed my hair black from not wanting to be a villian