Well since we already have one non-human, it's safe to say that the existence of non-humans are common knowledge at this point. As for another non-human character, it depends. Is it a humanoid with non-human features (like wings etc, like the one already submitted) or is it something completely non-human like/alien? Cause having another humanoid would be kind of meh, but an alien being (and I mean alien as in different too humans, not an actually alien, though that would be cool too) would be interesting to include.