Okay, so I don't have many books on religion - outside of The Bible itself - but I can absolutely search my books on mythology. I'll also be at a library tomorrow, so if you want me to search for anything there, let me know. Either the being naturally looks beautiful, or it's a shapeshifter, which should narrow things down somewhat. Less so with the polytheistic deities - and of course, standards of beauty are different for everyone - but I think that you might want to look into who created the creatures of the woods. If you can somehow contact them, they'll be more interested in preserving the creatures.