The Bound believes that the original Goddess who sacrificed her immortality to guide the Bound into the Vinefields still lives. Born again as the Priestess.
The Priestess is a mysterious woman, who always rules over The Faith, and has done so for as long as the Bound can remember. Though nobody believes it is the same woman that led them into the Vinefields, she is a direct descendant. And Daughter after daughter takes her place.