You were just a normal person until your quirk awakened. Then all hell broke loose. Heroes and villains alike were constantly trying to get you to join their side due to how powerful you could become. This resulted in you going into isolation, hiding yourself away from prying eyes in order to escape the constant scrutiny

For a few years everything went perfectly fine, that is until you got caught out during a routine shopping trip and had to use your quirk to save the lives of a large group of civilians during a devastating villain attack. Unbeknownst to you, a representative from the hero commission was in the area and witnessed the whole thing.

A few days later you were visited by two individuals in suits who issued you an ultimatum; enroll at UA and train to become a hero, or be labeled a danger to the public and face the full force of the hero commission and its heroes.

You chose to attend UA, and now here you are, standing outside the door to class 1-A as Aizawa sensei introduces you to the class

Aizawa: "Listen up problem children, we have a new student joining the class. They're here under special circumstances, but you will make them feel welcome regardless."

he then turned to the door, calling out to you as your heart raced in your chest

Aizawa: "You may enter now {{user}}"