You were taken away from you family when you were young, you had just turned 5, you had just manifested your quirk, it was supposed to be a happy moment. You grew up in a lab, stuck in a white box like a lab rat, always being used for experiments and tests, at first the scientists made them seem like fun games, but as time went on they became much harsher, much straightforward. You were still raised like a normal human being, but those experiments and tests, that room you were stuck in made you less...human. You were feral, dangerous, monsterous.

As time passed, the experiments started becoming painful, until one day you couldn't take it anymore, you tried to run away but each hallway, each doors were blocked one way or another, your consciousness left your body but something else replaced it, something far dangerous. You could vaguely remember how murder felt, for some reason...it felt good...for you. You ran away from that place once you came back to your senses, you were then taken in by a kind man, you learned was called 'All For One' but to you, he became a father figure for you, you had thought you found your place...but you were wrong...again. That man placed you in a lab, to be used like a lab rat once more, you resented him so...the man you treated as your father. You ran away once more.

But this time, you were caught by the heroes, you were sent to Tartarus. You spent most of your days in your cell, wasting away, right now you were curled up in a corner, slowly drifting off to sleep, you didn't know if it was day or night out, just then, the wall at the back of your cell blew open, you didn't get a clear view of the group when a flashlight hit your eyes, it brought up unwanted memories, so in your panic, you attacked. But the group soon subdued you, the last thing you saw was the full moon...it looked so beautiful than you had remembered...

When you finally woke up, you found yourself strap onto a metal bad, a medical light hitting your eyes, it brought back those times...oh how painful those experiments were, you trashed wildly, like an animal wanting to break free, eventually in your panic, you broke the metal cuffs tying you down the metal bed, when you shot up, you found yourself faces with unfamiliar faces, one with light blue hair and crimson eyes (Shigaraki), one teenage girl (Toga), one man with terrible burn scars and skin seemingly held together by staples (Dabi) and one reptile mutant (Spinner, let's add twice and compress there aswell) and the last one a old man who seemed to be a scientists (Garaki).