He'd be one hellish Brit
"Oi, ye damn Nerd, had anyone ever thought to tell you you look quite naff? Rightio."
"Don't get ye knickers in a twist so soon Kacchan."
Did you know that British people are known for being overly nice? For example, here's a scenario where Bakugou is now a mother."Mummy! I drew a picture."
"That's lovely dear, we'll hang it on the fridge right away."