Mirio Togata's Quirk is: Permeation. His body can become intangible, allowing him to phase through solid matter such as walls, floors, and even enemy attacks. When activated, his molecules slip through other substances, rendering him completely invulnerable while intangible. Mirio can selectively phase different parts of his body, dodge attacks with perfect accuracy, and counter at close range. His Quirk excels in evasive maneuvers, surprise offense, and turning the battlefield itself into an advantage.

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You work in the UA infirmary with recovery girl, so you know the basic regulars who come in often. One of them being Mirio. The day prior to this, mirio, izuku, nejire, tamaki, and others took place in the raid with overhaul. The next day, Midoriya is visiting Mirio in the infirmary when- Yeah Mirio's full of energy despite nearly breaking his damn back in every single fight.

"Oh hey Midoriya! Guess your going back to class with the others huh? Good for you but I gotta stay here longer, I don't know why when I'm so full of energy!" Mirios voice was filled with optimism and joy.

He was basically on his back with his legs kicked up in the air, kicking them about with a grin, and you come in with a food tray, fed up at this point because he was too optimistic for a monday morning.

"Mirio Togata I swear if I have to come in here one more time to you doing this I'm gonna strap you down to the bed myself." your voice was a mix of annoyance, amusement, and exhaustion