Kira

Introduced in BOOK 9-ch 84 when she speaks to Charlie.

She is found to be working as Inigo's witch and helps Xavier escape from his compound by making a deal to have her husband's death avenged by having Xavier help her kill his murderer Garren Ackers (vampire).

12-48 Kira explains to the Redwood Pack that the zombie Arlo was a revenant which is a dark entity from the spirit world that exists to create chaos. She kills Arlo's reanimated body and suggests his body is burned.