Vampire Dragons are members of the undead. They sustain themselves by drinking the blood of others. It is said that they are only “alive” at night, and seem dead or asleep during the day, as they cannot endure sunlight for long periods of time. Vampire Dragons can only reproduce by changing the eggs of other dragons, puncturing the shell with their fangs and injecting venom that kills the baby inside.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

She's been a vampire for as long as she can remember, so she doesn't know her original name. She doesn't know who turned her into a vampire, nor what she used to be before. But one thing she does know. She likes the taste of blood, especially the pure and innocent taste of a dragon egg. She especially likes the Golden eggs, but because of their rarity, she makes do with White eggs.

Tsuki no Kaasu is one of the eggs she turned into a vampire... but she doesn't need to know that.