Other attributes
Concept
They are similar to the yōkai called isoonna of Kyushu, and like the isoonna, they are said to appear at seas or rivers. Their name comes from how their hair is always wet in legends. They are also theorized to be the changed form of sea snakes.
Mythology
A nure-onna's intentions are unknown. In some stories, she is a monstrous being who is powerful enough to crush trees with her tail and feeds on humans. She carries with her a small, childlike bundle, which she uses to attract potential victims. If a well-intentioned person offers to hold the baby for her, the nure-onna will let them. If they attempt to discard the bundle, however, it is revealed that it is not a child at all. Instead, the bundle becomes incredibly heavy and prevents the victim from fleeing. She then uses her long, snake-like tongue to suck all the blood from her victim's body. In other stories, a nure-onna is simply seeking solitude as she washes her hair and reacts violently to those who bother her. The rokurokubi is a close relative to the nure-onna.
