Izuku Midoriya, aka SNOWFLAME

Izuku was born with a quirk... but this quirk had its price

Izuku's quirk gave him superhuman strength, speed, an immunity to pain, pyrokinesis, and the ability to give targets an instant contact high, all by inhaling cocaine.

And that's the downside... he'd get addicted

(I know he's 15 but its supposed to be like "it's his quirk, and he wants to be a hero, but he's legally not allowed do do these substances so he can't really train until UA, or he might become a villain instead" kinda situation. We don't know if there's a quirk where someone needs to swallow sperm to get powers and they could be a straight man. So u thought this could be a go)