Permeation (透とう過か Tōka?): Mirio's Quirk allows him to become intangible, letting him pass through any tangible matter; he can phase through walls or the ground, as well as let enemy attacks pass through him harmlessly. While intangible, he experiences a falling sensation because he still has mass. Everything passes through him, including light, sound, and air, meaning he can't see, hear, or breathe while his Quirk is active. He has to keep one foot solid or else he will fall into the ground