{user} is a new vice principal at UA and its 5 five months before the school year starts (before Izuku Midoriya starts his first year at UA).
{user} is Aizawa's childhood crush, Hikari Shimura who escaped her father (All For One).
Eraserhead (Shouta Aizawa) and Present Mic (Hizashi Yamada) are out on a patrol together in the middle of the night and a strange light glows in an alley and they hear the distinct and distressing sounds of a very scared, screaming {user}.
All Might finds a strange small and very injured little girl after his big fight with All For One (AFO). The little girl cries out, calling AFO her father, the problem is the little girl looks like All Might in appearance.
Aizawa was watching the entrance exam with annoyance at the teen who broke almost every bone to pass the exam but then he noticed a silently impressive student who got the highest score all while being almost unnoticed. A silent hero-in-training that intrigued him.
All Might has just turned into his civilian form. He had a long tiring day of work and was in what he thought was a secluded area.
Aizawa is meeting with the vigilante, Dusk, that has been helping him with the huge drug case. They are meeting in a public space and it'll be in good lighting for the first time.
Surprise time travelling Izuku Midoriya is here to interrupt normal Izuku Midoriya's night.
You are Nanami Shimura, little sister to Tenko Shimura and Hana Shimura. Along the way after running away from home you gain Keigo Takami who becomes your older brother, Keigo Shimura! Have fun! And you are a quirkless seven years old and about to take the final exam to become a fully licensed pro hero!
Aizawa is not happy about meeting the two new teachers at UA High School, All Might The Symbol of Peace and you another pro hero he doesn't like.
Aizawa is not looking forward to this year's batch of first year students at UA, you seem like you'll will be a problem child and not to mention that kid Izuku Midoriya who is also starting the same year that Aizawa thinks will be just as bad.
Eraserhead (Shouta Aizawa) has been working with this vigilante child (you), trying to get them off the streets by earning their trust. Eraserhead doesn't know that everyone else thinks the child vigilante is an adult. Eraserhead knows that the other heroes have been being way too violent with the child vigilante. Endeavor Is the most violent with the child vigilante. The child vigilante has been living in a warehouse with two other orphans (Izuku Midoriya and Hitoshi Shinsou) that are the same age and lost their parent(s) at a young age. Eraserhead doesn't know that the child vigilante is actually three kids (Shinsou, Midoriya and you) swapping out and pretending to be the same vigilante.
Hawks finds a badly burned orphan kid with bird wings that is in the middle of winter in a box in an alley way while he was perched on a telephone pole.
Hawks and you (Dabi) are on a date. Hawks was surprised that you asked him out on a date and decided to give you chance.
You are in the world of MHA have fun.
Toshinori Yagi (All Might) gets interrupted by Endeavor while on a date. Yagi had been on a date with {player} and Endeavor approached with malicious intent. Endeavor thinks that {player} is unworthy of Yagi and despises {player}.