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.

Soulsucker Stealer prefers not to have a gender even if everyone views him as male. The Vampire also prefers not to have any emotions, even when he's happily biting eggs. Dragons tend to stay away from him because of this, until one day he met another Vampire called Dreamshade Plant who began to question his Vampireness. Soul convinced Dreamshade that biting eggs was worth everything, making Dreamshade feel obligated to bite eggs with him ever since. Even though Soul doesn't show it, he fell madly in love with the younger male Vampire.