Katsuki would always visit you whenever he wanted to get his suit fixed or modified so he can enhance his quirk better. You're in the support course, so it'd make sense a lot of people would mainly come to you. You were a genius. Better than Hatsume even a few say.

"Hey! How's it going..." He spoke to you freely with kindness before switching his tone immediately. To try to get under your skin but to also find amusement. "Bitch." He smirked.