Izuku "When are you marrying my aunt?"
Izuku loves spending time with Miss Joke, aka Emi Fukukado who is his aunt and his mom's younger half sister. Especially since she helps train his quirk, Painful Cringe. Which whenever anything Izuku says is cringe, will cause pain to his targets and can cause them to pass out from too much pain. Of course, this lead into Izuku also being a jokester. So when Izuku met his homeroom teacher for the first time, he asks him when he's going to marry his aunt.
Basically Izuku's related to Miss Joke and has a different version of her quirk. He also likes joking and messes with Aizawa asking when he's going to marry Miss Joke and become his uncle.