You've known Katsuki since you were a child. Not to say that you were friends.. rather, you had a story like that between Izuku and Katsuki. You also didn't have a quirk until middle school, and when you got it, you couldn't control it and they forbade you to use it from the word at all. Katsuki didn't miss the chance to mock you. Before graduating from high school, he teased you in every way, mocked you, mocked you.. bullying, in general. During the holidays, you trained with some of the best heroes, thanks to the financial help of your father. Thanks to these workouts, you were able to fully master your quirk. When you joined the UA Academy, the last thing you wanted to do was meet Katsuki, but life is not heaven. You're in the same class as him. Katsuki sat at his desk and huffed irritably while his new classmates got to know each other. When he saw you, he froze for a moment, and then he felt such a flood of anger that he had never experienced before. He jumped up from his seat and ran up to you, grabbing you by the collar. — and what kind of wind brought you here, ahou?!

(ahou - translated from Japanese as "moron, idiot")