Datsui-Babaa

Datsui-Babaa or Datsue-ba (奪衣婆 or 脱衣婆, lit. "old woman who strips clothes") is wizened, ugly hag of a youkai.
Datsui-Babaa is a grotesque hag, with long straight, blue hair parted in the middle of her hideous face and poor skin complexion. She wears a white kimono with a blue obi. While disguised, she appears as beautiful young woman, with long black hair and fair skin. Her kimono is instead white and pink.
Not to be confused with Datsue-Babaa.

(Source: GeGeGe no Kitarou Wiki)