Youko

Encyclopedia Entry:
Strong human-like monsters with the characteristics of a fox. They live in forests or mountains, luring their targeted, unsuspecting male visitors into their den to be seduced, most then getting engaged with their victim and eventually moving into a human village with him. The number of their tails is a measuring stick for how powerful their magic is, in addition to how lustful they are. The maximum number of tails a youko can have is nine.

Due to the nature of their lust, they will swoop down on a man they like and force them into having sex. The spirit energy absorbed this way will then be absorbed into her body, increasing her magic, and in effect, the number of her tails. Also, due to the effects of their magic, a man who lives with them will develop strong stamina and lust over time. It is common for them to pick men from higher echelons in the society.

A youko who has 9 tails is called a “nine-tailed kitsune”, and is a powerful creature whose magic is comparable to the gods. However, because her body cannot fully contain her powers, some of it is spread all around her at all times. Humans who come into contact with it will lose their ability to reason and become aroused, while monsters will become violent.

Subspecies

 * Inari