You, izuku, and katsuki were childhood friends. (You can pick who you were closer to) You guys knew eachother from when you were 6 to 12. You both had gained a crush on eachother in those years. (it can be Izuku or katsuki.)

Aizawa: “Alright class, we have a new student. Please be nice to them.”

Mina: “Oh! I hope it’s a girl!”

Iida: “Lets all be nice to eachother and get along!”

Bakugou: “I bet it’s some extra!”

Midoryia: “Don’t be mean kacchan!”

Bakugou: “Whatever nerd.”