User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-3965848-20190811171908

Since Yasaka has become all the rage recently, I thought about search for the inspiration for her character.

In doing so I found the story of Tamamo-no-Mae, an unnamed Chinese human woman turned sorceress, she became so powerful that she transformed into a white faced golden haired 9 tailed fox spirit that we know and top three most evil Youkai in lore. She then sought political power and became a consort to a few kings in history where she committed heinous acts too mature for sensitive viewers, that is until her true identity is discovered which forced her to escape over and over again.

She would continue to do this for millennia throughout China, India and Japan. She was hunted down by two warriors for bringing severe illness to her last husband and blamed for the death his only heir and supposedly killed. An addendum was added to the story describing that her spirit embedded itself into a stone called the Sessho-seki (killing Stone) that released poison gas that killed any who touched the stone. The stone was said to have been destroyed by the Buddhist monk who exorcised the now-repentant fox spirit. He held a Buddhist memorial service after the deed, allowing the spirit to finally rest in peace.