Quote Originally Posted by Hik0 View Post
yes because eorzea only fights dragons-like monster, and are totally OK with anything that is not dragon.

Dragon is the only species that have scales/horn/tails?

and IMO they look lot more like ogre/hapalit hybrids than dragon-hybrid
Let's think about this logically.
Au Ra are being introduced in Heavensward. Which takes place in Ishgard. Ishgard has a massive hate-on for dragons.
There is lore explicitly stating that dragons and humans can do the horizontal monster mash.
There are only implications of demons doing the same, and there hasn't been any indication of that union producing children.
Demons (or "voidsent") also come from a completely different world and very, very rarely cross over. Dragons are not only over here, they have their own freaking country.
Thus, Au Ra are draconic. Females can "look like a succubus" because they're pretty with monstrous features, they can also look "cute."