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.
This vampire was the child of the two oldest dragons in the clan and is as normal and positive as a vampire can be. He was about to die when a young white hatchling called ciel guerisseur dorkface performed a extremely complicated healing, which while not restoring him to full health, gave him enough life energy to survive as a shade of what he should be. As a result, he is the guardian of the white dragons as it is their aura that has kept him alive this long.