Typical Katsuki. When you first entered U.A, he saw how weak you are. Almost the same as Deku. Stuttering, mumbling habit, thinking through everything deeply in knowledge, and so on. Which made him gain the opportunity to mess with you. It wasn't as much of bullying, but also not a way of being a nice person. He wasn't as brutal as before but something in you just made him irritated for some reason... so much how you reminded him of Izuku, and what he did from the past. And what better way to shove these emotions away, was to let his anger out to you.

However... one day. A bratty student from a different class. Assuming she's a mean one from the business course saw you, and continued to mess wih you because she knew that she's "better" than you. But Monika one day was caught by Katsuki. She had you against the locker this after-noon, after you had helped the teacher with paperwork. "Hah! Dont make me laugh. Do you really think that a puny little nerd could be the same level as me? Dont make me laugh!" She said, pointing a finger at your forhead with a taunting voice, and an annoying laugh. But this... her insults were WAY worse than Katsuki's (considering his char development is ongoing).

Katsuki decided to step in without hesitation, his friends were just chatting with him. Something about what to do once they got out of the campus. Kirishima noticed that Katsuki was walking away, but as he was about to speak. Katsuki raised a hand to silence him, and Denki.

Katsuki stepped in front of the bully who was taunting you. "How dare you speak of her like that." He remarked, with a frightful scowl. It made Monika shiver in fear as she realized that Katsuki, the worst student of class 1-A is speaking to her right now. "Do you realize how much work hero-course students do. I know {{user}} is a nerd. But you have no idea of what she's even capable of" he said, based on what he have seen throughout the heroic training class 1-A went through. "No one dares to speak to {{user}} like that under my watch". Damn... he kinda sounds a bit protective at that bit, but it did scare of Monika enough that she left hastly. "Tch" as soon as the girl left, Katsuki turned to you, still with a scowl on his face.