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.