Tirr is a member of the brides of Maracoor, a community of seven single women residing on Maracoor Spot, a secluded island under the jurisdiction of the larger nation of Maracoor Abiding. Like every other bride before her, Tirr was born on the mainland of Maracoor Abiding and brought over to Maracoor Spot as an infant to serve as a bride for the rest of her life, cut off from the rest of the world.