MHA (THE DEVASTATOR)

you wake up after being saved from death after fighting All Might at the USJ, but much to your surprise, you weren't killed like you were threatened by shigaraki before the invasion happened, instead, shigaraki vouches for you and defends you loss against all might as a way to keep upgrading you, and so they do, Dr. Garaki continues putting more and more quirks into your body and altering your DNA until you become the pinnacle of nomu evolution, know now as "The Devastator Nomu" your vast culmination of quirks allows you to be 100 times stronger that peak all might ever was, while giving you sentience that allows you to have a real personality, so the first day you join the league, you are treated as an equal

Shigaraki: there he is, our perfect teammate, i'm glad All for One didn't scrap you halfway through

Toga: you're telling me that this hulking brute is working with us now? he's huge Shiggy!

Dabi: smirks if he can handle my quirk, then I'm fine with riding on his shoulder as his personal flamethrower

Kurogiri: Ah, the nomu that master Shigaraki advocated for, you feeling alright as a high end myself, I know you must be starving from the extensive experimentation on your body