Ao-nyobo

Ao-nyobo
In the ruins of an old imperial palace, one might encounter this female ghoul, who seems to be the ghost of an old-fashioned court lady with blackened teeth and shaved eyebrows. She is rumored to devour young men who visit her.

This yokai’s name is a bit misleading without context. Literally, it means “blue wife,” but it is also an archaic term for a young, inexperienced courtesan, or the servant of an aristocrat. The Japanese word for blue, ao, is similar to the English word green, in that it means both a color and a level of experience. And nyobo, meaning wife, can also refer to a woman of the imperial court in ages  past.