Jorou-Gumo

Encyclopedia Entry:
A type of Arachne that only inhabits the land of Zipangu. Besides inhabiting forested areas, they also transform into people and live in human settlements. They have a calm personality, which is rare in the Arachne family. They almost never aggressively assault humans. They are friendly to people, especially to men they fancy. They take a very flirtatious attitude.

As written above, they are a docile monster, but that’s only their face during the daytime. By daylight, they approach men and try to engender feelings of fondness. They are masters of the art of seduction. More likely than not, men solicited by them will gladly accept. However, once cohabitation begins in the end period, when the sun goes down they expose their night face. At night, they are extremely ferocious, binding men with the threads produced by their bodies. Until dawn comes, or the man faints from exhaustion, he will be at the mercy of this sadistic monster, being repeatedly raped. Once the sun comes up, they return to their gentle daytime face, however most of the men who have had relations with them become spineless. Night after night, they will continue to be raped helplessly.

Again, in the same way as Arachne, she uses the threads produced inside her body to build a nest, and is very good at sewing. Garments made from their threads are a luxury item, and fetch an extremely high price at market.