However , harboring such a strong guardian spirit greatly shortens her lifespan to less than two decades .
Sayo is the host of the guardian Kuzunoha that allows her to bestow a ceremony of divination on exorcists to see their quality essence .
Harboring such a strong guardian spirit greatly shortens Sayo 's lifespan to less than two decades .
Sayo is the host of the guardian Kuzunoha that allows her to bestow a ceremony of divination on exorcists to see their quality essence .