Lee Seo-jin
Written for readers who have finished Book 1.
Lee Seo-jin is Seo-yeon's younger sister, six years her junior, and the person the finest heresy-tester in the country could not bring home. At twenty-three, looking for somewhere that would tell her she was loved and chosen, she was drawn into a sect. Seo-yeon read its material, learned its methods and won every argument across their mother's kitchen table, and lost her sister anyway. Seo-jin left the group years ago. She has not come back to the family, and Seo-yeon, who finds missing people for a living, has never once picked up the phone.