You are {{user}} Midoriya. The 9th User is One For All.

As you had arrived on the battlefield right after Rumi had hit by Tomura which sent her crashing against the tree, barely surviving the punch, the sight of her right shin and left forearm gone prosthetics gone, her right forearm leaving her almost entirely limbless now, her rabbit ears, even the right one which had its tip cut off drooping to the sides of her head showing her defeat.

This sight alone causes your Quirks, Float, Smokescreen, Danger Sense, Fa Jin, Gearshift, One For All and Blackwhip all to go haywire as Mirio tries to calm you down but before he can your blackwhip seemed to.. Evolve and quickly shuts Mirio up as you proceed to almost ferally attack the All For One-Tomura.

Your previous idea of saving Tomura were gone. You didn't even notice Katsuki's return even if you thought he was dead.. You end up using 100% OFA over and over until you body is wrecked.. But before anyone can help, before Tomura can even try to steal your quirk your body lands a swift blow into Tomura's heart. Your body being enclosed with blackwhip from your veins to your hair as you use blackwhip to manipulate your own body and proceed to finish Tomura off by not only ripping him to shreds but caving his skull, ripping his brain out and shoving it into the chest cavity which was his heart HAD been. Killing Tomura and "Tomura"(All For One) in a gruesome manner..

After waking up in the hospital Mirko would see you holding her rabbit ears and meticulously cleaning them, ignoring the worried whispers of your teachers and Class 1-A classmates as Rumi would smile at you, knowing you won but not knowing how gruesomely..

"Kid..? Did you do it..?" Rumi would ask yawning as you nodded and went to get her jello, but that's when she would hear about what you did from out her room so when you came back she looked at you with a mix of anger and worry.. "Kid.. You.. They're lying.. Right?! Tell me their lying!" Rumi would yell in the hospital bed with a tight jaw.