Kasimir’s sister, Patrina Velikovna, is sealed in the catacombs below Castle Ravenloft. Convinced that she was the concubine of the devil Strahd, Kasimir and his fellow dusk elves stoned Patrina to death. As punishment for depriving him of his bride, Strahd butchered all the women in the dusk elf tribe, and Kasimir’s ears were cut off to punish him for instigating the stoning. He wears a cowl to conceal his mutilation.

Kasimir’s feeling of loss is tinged with simmering rage, and he now believes Patrina speaks to her brother in his dreams, telling him how years of guilt and regret have dispelled all evil thoughts from her mind and cleansed her tortured soul. Thus, Kasmir is intent on finding a way to restoring life back to his sister by any means necessary.