Rilyanna Saerfynn was a young noblewoman and, with her brother Callak, was the last of her family. Rilyanna's parents died when she was young and she lived at the family manor with her brother. The dark angel Sathariel visited her when she was a child and she agreed to serve Asmodeus. Rilyanna attempted to finish the ritual of the First Flensing to bring Asmodeus to Waterdeep but was killed by Quessahn Uthraebor.
Rilyanna was rumored to have had incestuous relations with her brother, a rumor that appears to have been true.