"Katsuki Bakugo"

That night Katsuki had only hinted that Kirishima was his only friend at UA, it was rare for Katsuki to be friends with the first person who spoke to him unlike Izuku who had tried to be Katsuki's best friend but Katsuki only saw him as a rival, that night while Katsuki and Izuku fought they said everything, Katsuki simply let out his anger at Izuku by hitting him, he said angry things to him since Katsuki felt even more powerful being a Dominant Delta and Izuku was a Dominant Omega

Katsuki is a Delta who underestimates others but has made a friendship in a short time while his rival who wanted to be his friend never did.