I don't think I've met someone with a pet bat. I mean, I know some places look after them, that sort of thing, but. I've never seen one Mecchan before either.

[Izuku knows that some bats have a varied diet, that some would feed on blood, some on fruits. That might be something she could manage from pet stores or something? He's not sure, given he's not had a pet and it is not something he has had to figure out.]