They are basically animals that walk upright, talk, etc. I don't mind a wide variety of them in terms of how they look, but your question gives me an idea for the future. The second Continent is supposed to be less advanced due to magic or something. So the beastkin there would retain a lot more physical features of the animal they are based on. 

Also. Yeah. That's fine. One of the NPCs, is a Tengu, who was born in a monk-like setting. His best friend was left on their doorstep essentially.