Answer, may help others too
in reply to a message by La Reina
Wandering Moon, who decided, said that anything was fair game. I'm going to assume a Rowling-esque world where pretty much any creature or being you can think of is present somewhere, even if they aren't what you would expect them to be. So assume there are elves, fairies, centaurs, gablins, gnomes, giants, dwarves, etc. If you introduce them, you get to decide what they are like!