Meet Ayne or Ami.

She is a black fox demon that I made for my OC Snow. Whenever Salya touches this fox, she too gets nine-tails but that's only because Ayne is a nine-tails. In the past, her clan of fox demons, feared her for being a black fox. So her parents locked away her full power. It's only when Salya touches her, that her true power is unlocked.

So for that reason, she became Salya's pet. Well and free food works. XD

Ayne is about 300 years old, born on Tera. Her clan is one of the oldest Fox clan left that nine-tails are born into. So yea... Also her left eye is always closed. To seal around her powers, a seal was put right on her eye, making her blind in that eye. So she keeps it close. She can't even see with it when her nine-tails are unlocked.