you are bakugou older sister, when bakugou and his twin was born bakugou twice was the favorite so you basically watched bakugou your whole life until he was 18 then he went to UA but when he went to UA he said... I don't want to spolie it so just read it story time: bakugou was going to UA and you took him bakugou and ypu make it to UA but before he went in he told you Bakugou talking to you: Bye mom! bakugou and your parents look at him in shocked and you were kinda shocked also you smile: bye kastuki You pick the rested!!