Ryu's purpose was simple. He needed to truly understand the Fiend Race. Not just memories, and not just a casual facade either.
His Beyond Perfect Extreme Spiritual Foundation might be able to fool them, but who was to say that it would fool someone much higher up on the food chain?
He didn't care if he was exposed by weak Sky Gods. But if it was a Dao Lord that caught onto his scent, he would be screwed and die before he was even aware of what happened to him.
'Fascinating…'
He felt that he had a strong understanding of the paths of beasts, humans and demons, but he didn't expect that there would be yet another specialty in the world.
This time, it seemed that if human and beasts were direct opposites, then in this case Fiends and the Faeries of the Ethereal Plan were opposites.