MHA Shinobi
All of Class A and Class B a reinc as shinobi in the Naru vs.
They are all born with variations of their Quirks. (The mutations are minimized to almost nothing.)
Their former life memories are very vague but it makes them resistant to the sort of BS Danzo AND Orochimaru like to try and pull.
Izuku doesn’t have OfA but he does have traces of the previous holder's Quirks.
A few extra seconds in the air thanks to Float.
Black threads from his fingertips thanks to Black Whip.
An ability to share these with another while in physical contact thanks to Pass it On if only for a minute or so.
A vague sense of something wrong while going in the direction of danger thanks to Danger Sense.
A very faint smog that lasts less than a minute thanks to Smoke Screen.
You get the idea.
Fortunately, ALL of these could be boosted using Chakra but they can’t be used at one time, though Izuku had gotten very good at switching fast.
The once Iida didn’t have his engines but he did have speed still.
Koda’s head and skin weren’t rocky but he still had a touch with animals.
Mena’s skin wasn’t a dark pink and her acid was far weaker. Her antenna were barely there nubs in her hair.
Sato was actually an Akamichi.
Manga and Bondo were mostly human too, though neither were nin. One was a writer and the other was in construction.
Fumi was simply very dark of skin with feathers in his hair and half Nara. Dark Shadow was literally his shadow rather than living within him.
Momo couldn’t make anything anymore, beyond simply chemical compounds, simple weapons or things like glass bottles.
Shouto simply had a strong affinity with fire, water and wind. It takes trial and error, but he has his ice and fire back. His wind can be used to enhance either his water or his fire.
Bakugo simply has an afinity for Fire and Lightning Chakra. He has to WORK for his explosions now. He's half whatever Deidera was and has the mouth hands too.