Tamamo-no-Mae

A beautiful woman who served Emperor Toba said to be the disguised figure of the white-faced, nine-tailed fox. Her childhood name was Misukume. Working in the palace since she was 18 years old, she later became a court lady of Emperor Toba under the name of Tamamo-no-Mae. She was said to have gradually gained the favor of Emperor Toba with her beauty and extensive knowledge.

In reality, she is a soul that branched off from Amaterasu and her true identity is not that of a nine-tailed fox, but rather is treated as one of the facets of said goddess. It is wrong to categorize her as a Heroic Spirit though she manifests as such because she wished to "become a good wife"

The Tamamo Nine are a group of nine Heroic Spirits consisting of Tamamo-no-Mae and eight Alter Egos of her.

In Fate/Extra