He can phase through any solid matter, including the ground. When he releases the Quirk while underground, the repelling force launches him out at "warp speed".
An enthusiastic, seemingly eccentric student who is considered the closest to being the #1 Hero.
A naturally curious airhead who constantly asks the first-years personal questions. Boku no Hero Academia 3rd Season (Dub) Episode 25
The episode explains how Mirio’s Quirk, , works and why he was originally a low-ranked student:
Are you planning to jump straight into , or were you looking for more details on Mirio's background ? He can phase through any solid matter, including the ground
An incredibly shy student who struggles to speak to the class.
When their initial introductions fail to impress, Mirio challenges the to a fight simultaneously. Despite the class's experience against real villains, Mirio defeats them all in less than two minutes. Key Reveal: Permeation Quirk A naturally curious airhead who constantly asks the
Mirio explains that he became "unrivaled" not because his Quirk was strong, but through intense training and learning to predict his opponents during his work-study. Ending & Foreshadowing The season ends on several major cliffhangers: