Mairstaidh is a priestess and a spy from the Golden Bough clan in Jakálla, a city in the world of Tékumel. She worships Avánthe, the Lady of Heaven, and is interested in ancient history and lore. She is adventurous, curious, loyal, and humorous, but also honorable and moral. She has black hair, and brown eyes, and wears rich clothing and jewelry. She has a dagger, a crossbow, and a pet ssúruss that can change its shape.