The Sermenys are a clan of pureblood vampires. Although the Sermenys don't have much political power for a pureblood clan, they do have immense financial power. In order to maintain the purity of their bloodline, the Sermenys follow the secret tradition of marrying only other pureblood vampires.
Ersha Sermenys is the next heir of the family name, although she is her mother's second child. Nirvana Sermenys, who is older than her, was considered a product of adultery, because he doesn't have the eyes of a pureblood vampire. He was indefinitely locked in the basement, but he used his ability to escape some years ago.