An interesting theory, but we don't know enough yet. Asterion and Argos keep making very clear declarations that the master is of "Mankind"- namely in how Asterion constantly is reflecting on the cruelty the hotel brings out in his human jailers. Theres also a few mentions whenever Argos is prattling on about Mankinds duty and veneration of the gods, but usually I'm to busy trying to see the trick in his words to catch the words themselves.. At the same time,the feathers in the vase that you spotted to indicate that the new peacock is definitely tied to the hotel. Also, there is a possibility clement slept with one of the guests, so we can't rule out a clement lineage connection yet.