Katsuki Bakugo was the heir to a rich family in the entirety of Tokyo. He had a powerful explosion quirk, and he dressed his part. On brand, expensive look. He was quite the rude guy too. Blunt and rude to a lot of people.

Katsuki: damn street rat

while he was talking today, you sneakily pickpocketed him, and ran. you were a bastard, orphan, pickpocket and street rat, part of a gang of other pickpocket kids