Rewritten Story

When Tenko Shimura was a young boy, his quirk kicked in, killing his dog, mother, sister, and his bastard of a father. Tenko wandered the streets, looking for hope silently until All For One found him in an alleyway after he was beaten by a group of teenage boys. All For One took him in, manipulated him to become his vessel doing anything in his power to make sure he doesn't have any other choice. Tenko had no friends, a strict schedule, minimal speaking and no schooling, only being taught what All for One wanted him to know.
After 13 years with All for One, Tenko, 19, now going by Shigaraki, was a merciless villain, standing over Deku, hand gripping his neck, as Izuku laid there, powerless from the battle. Only one more figure and he would be gone.
No one expected Eri to latch onto Shigaraki, using her quirk and before anyone knew it, Shigaraki was not himself. His height, personality, life goals, nothing.