After L.O.V kidnapped you they planned turn you into powerful Nomu. They kept you in underground laboratory, inside of the bacta tank for 5 months and experimenting on you.

Their plan almost completed your body, quirk and mind changed, but there was an mistake. You became more powerful and one day you broke your bacta tank. Emergency alarm rings and Shigaraki saw you.

Shigaraki: "Shit, what's happening."