Sara

Sara is Kagetsu's sister and a childhood friend of Tiara. She is a sweet, gentle girl with a weak constitution, possessing untapped ability as a Neutralizer. She mysteriously disappeared before the Throne of Yord incident began. At the conclusion of the "Throne of Yord Saga," it is implied (and this is indeed what saves Tiara's life) that Sara is and always has been a part of the Throne of Yord, and that she was destined to join it from birth.