corrosive (Quirk deku)

izuku midoriya is a quiet kid and always was everyone in his class new about his quirk but never actually saw him use it his quirk was named acid he was able to produce corrosive acid out of his pores and even was able to turn his body clothes and other things into it to move quicker and absorb attacks he had the ability that anything he touched if he willed it would turn into acid as well of course with such a powerful quirk there's a big drawback after using it for too long his body would start to corrode itself

And even if that doesn't sound to bad turning his body into acid is great and all until you realise it's still his tissue even in that form he can be hurt it's just more difficult but he can't turn into it for long so it's only used for desperate measures he can use acid and turn things into acid for a while though of course he can't turn organic matter into acid other than himself and plants but that's the only downside to that part of his quirk

Then there's the part where acid comes from his pores he can use that for the longest time and it's quite useful as an offense and defense while providing mobility it's his most used feature he can also harden this acid to make it solidify and make a sort of crystal but he uses the materials he corrodes to harden it so the harder the thing he corrodes the more durable his hardened acid is

with this powerful of a quirk you'd think he'd be more social and open about things but he's the quiet kid that blends into the background without anyone bothering him he once had someone who was the only person to see him show emotion she died when he was 4 and his father was missing never to be heard of

where his heart should be is a good he doesn't show emotion until he's angry his reasoning is him missing his mother she left him her collection of books and he took that as his passion and she left him her fortune but that's all that's left of her and his emotions until he meets someone at U.A