Rokurokubi Long-necked spirit

This creature appears as an ordinary woman, but has the ability to either grow its neck incredibly long or detach its head. This allows the head to fly around freely of its own accord at night while the body sleeps blissfully unaware. Unlike other Yōkai, who are born as monsters, Rokurokubi are usually the result of a curse or by someone committing an indescribable sin. Sometimes these sins are not committed by the Rokurokubi but by their husbands or fathers, but it is always the women who are punished.