The Yaobikuni monks currently known seem to belong to the former category, highly associated with Hirudinidae, which has removed them from the realm of humanity.
As for the latter direction, it's probably like what breeders do, turning themselves into eerie tales, or like what Kamiya is currently attempting to do, transforming oneself into a deity.
"Consolidating the Power of the Demon God within oneself and then absorbing the power of faith and incense to become an Arajin, Hotaru doesn't know if there's such an opportunity. Speaking of which, the Toyotama-hime behind the Kyojin Shrine, should be somewhat connected with Hotaru as a god child, right?"
"Becoming a divine possession, that's probably one way to strengthen the connection."
