I was thinking that only the gods have temples, but the more prominent Youkai have volumes where they are mentioned, but never by name. That is something that is only revealed to the human's they come to aid, and after they leave, they take the knowledge of their name with them. *Slow smile* You actually game me an idea of just "why" the Youkai goes to the youngest son rather than one of the sons already likely to ascend to the throne :P How do you feel about the idea of him not exactly doing what he was told to do, or taking on the boy as some sort of challenge to the judgment of the god he serves? It could lead to some fun scenes between the Youkai and others of his kind :P