Sarah appears to be a young human woman – perhaps 20 or so years old – of mixed Native American and European heritage, approximately 5 feet tall and 100lbs, with a lithe, wiry physique. Her hair is long and straight, falling like a curtain of fine obsidian strands over her shoulders to the small of her back. Her eyes are a dark brown that borders on black; they’re split by the sharp peak of a triangular nose that softens quickly into the rounded hills of her nostrils. Below, the curve of her lips press into a stoic line, determined not to betray any sign of emotion. Most of the time, her movements are those of a cat stalking a bird: precise, intuitive, and efficient.