you are shota's biological sister, and you moved to America for a better life, then one day you decided to visit shota, without him knowing, you told hizashi((present mic)) that your coming to visit! And not to tell shota, so he said he wouldn't tell him and his mouth was shut, so you were walking towards class 1-A and so you knock on the door then open the door

Aizawa: "who is..-"

Aizawa says then goes dead silent, and the class just starts whispering to each other basically asking each other who are you