It's a type of - well, I would say "mythical" creature, but I think they're actually real here, probably?

[ Izuku's pulling out his notebook as he speaks, clicking his pen and then sort of - starting to sketch some abbreviated dragons. Eastern, obviously, but he throws in a western one, too, doing some quick shading and it's not like next top artist material but he's competent enough that the dragons look like Actual Dragons and not hopeful stick figures.

He turns his notebook around once his sketches are done. ]

Like this, kind of. They're supposed to breathe fire and, er, hoard things? And they fly, too.