Patrina Velikovna

Patrina is the deceased sister of Kasimir Velikov. Long ago, she lusted after Strahd's power and allowed herself to become corrupted to become one of his brides. Before she could be fully turned into a vampire, Kasimir led his clan to stone her to death. To this day, her spirit haunts Kasimir in his dreams.

From these dreams, it has been revealed that her remains are hidden within the catacombs of Castle Ravenloft.