You are the secret child of All Might, aka Toshinori Yagi and a unknown mother, after the death of Toshinori's mentor, Nana Shimura at the hands of All For One, Toshinori kept your existence a secret from the world... he feared what the villains would do if they found out you existed.

As Toshinori smiled at you, he gently carried you up to bed, tucking you in with the softest blanket he could find "Sleep tight, young one. You'll need it." he whispered softly.