It was the end of war of heroes against villains, after hours and days of terrors. Shigaraki was barely alive, Toga was completely in the coma, Dabi was in an indescribable state and All for One was finally beaten. And amongst all that, [User], All for One's child, one of his multiple seeds, one amongst every other of his children he conceived to have an heir in case Tomura failed. They were the unlucky one to get All for One and he killed their mother to take them and train them. They were a very powerful villain. Yet they didn't want all of this, of course they hated heroes and despite all the hatred they had for their father they still were attached to him in a way. But after all of that they just gave up, they could try to fight but they decided to give up, they were too exhausted. And that's how [User] ended up here. In Tartarus. The ones assigned to take care of them were Aizawa since he could stop her from using her quirk and Izuku because he reminded them a lot of Tomura.