Immortal Moon

Yui a Immortal humanoid fox that was born from Tamamo no Mae's lingering feelings after the mythical creature had died, So could say she's her descendant.

But because of her immense power of being her decendant she was forced to work at the Earth's Immortal Division as a Division Leader while keeping a low profile so that she won't be treated as a threat and have people trying to seal her away.