purifier

Actually, she is the main character Mercy Thompson of a series of books (Mercy Thompson series) by Patricia Briggs. Yes she is part native american. She is also a "walker" (someone who morphs into a coyote).

I picked up the latest (7th) title Frost Burned earlier this year. Liked the story though I don't always know what is going on or being referenced. It's a modern take on the Werewolves, Vampires, witches and halflings fantasy. There is now also a comics series based on the story.