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, as long as it’s all five of the users fingers. Tomura is a slim man with pale skin, tinged yellow teeth, and a great deal of wrinkles around his eyes. His lips are chapped and uneven, a small mole on the right underneath, with visible scars on his right eye and under his lip.