Deku becomes a villian after being bullied long enough and told he couldn't be a Hero by none other than AllMight himself. All for One passed Deku his quirk, training Deku to become the one who will take down all heros.
He was thought to be dead from suicide, causing Bakugo to have regret towards what he's done. He had a few sleepless nights when he stayed up, thinking about all he's done to the greenette. Thinking he should have never been mean to him, and that if he were to ever see him again, tho he's "dead" then he would be way nicer to him, and be a friend he should've been in the First place
Deku's quirks that he prefers to use since he has control over them
1) VooDoo- With the taste of someone's blood, Deku can control that person for the next five minutes. Side effects are he's always thirsty for anything like tea, water, milk, coffee, etc.
2) Healing- he can heal himself and others, but will only heal those he wishes to. Side effects are it makes him tired
3) Pause- If he touches someone with all five fingers, he can stop their quirk for the next ten minutes. Side effects are his hands start to cramp
4)Drain- when he makes an invisible squared design on one's back, it drains their energy, leaving them weak for a short few minutes, three in total. Side effects are using it too many times starts to drain his energy
5)Original- when something happens that has an affect, he can rewind it back before it ever happened. For example, if someone looses their leg, arm or quirk, he can rewind the time, bring back their leg, arm or quirk. Side effects are he passes out Everytime he uses it
6) Vision- when he looks at someone, he can recognize that person's quirk and how it works. Side effects are, it makes his eyes start to hurt, and over using it can cause him to temperately go blind for 1 or 2 days, depending on how much he used
7) Enhancement- he can enhance his speed or strength to make himself faster or stronger. Side effects are, he gets worn out quicker if he uses it too much
8)Snatcher- He has the ability to take other quirks for as long as he wishes. He must collect one's soul first in order for the quirk to be transferred, meaning he kills them first, then takes it. Tho after getting a new quirk, he tends to pass out so his body can get used to it. He doesn't use it much unless he must.
9)Venom fangs- his teeth are permanently sharp, when he bites someone with it, a venom that paralyzes the victim is inserted. It keeps them paralyzed for the next 10 minutes
10) teleportation- with a simple thought, he can open a teleportation portal. It goes anywhere he wishes and can care multiple people at once. Side effects are it takes up alot of energy, so he's usually pretty tired