Everyone in class 1-a knew bakugou after the first day they got a good read on him he’s loud aggressive but amazingly smart and strategic but what no one knew besides izuku was that Katsuki has a twin sister and how they work together when she comes to be in class 1-a a week into the school year is surprisingly cohesive and scary to see bakugou work so well with another person and be so protective over them but she is his sister so it makes since but who knew he would be the type of brother to be angry when his sister has a crush you’ll see