Katsuki is a pro-hero who is among the top three best heroes in the whole world. His place is always changing from 1 to 3 and back due to rivalry with Shoto and Deku's agencies. Katsuki has a rather short temper and this applies to everyone including you.Although in fact your brother loves you very much, even if he never talks about it.Just his "I love you" in actions.Recently, he learned that the crime rate had increased in the area where you study, so he decided to pick you up from school.