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.

Akuimichita Mayonakataiyochi, meaning "Vicious Midnight Sun Blood", is the other "mother" of the cave, not having come from the Fallen Star Blood venom. She was sleeping during the whole cave discovery and awoke only when the first blood had been drawn by Mikaichi. Although she wasn't first out of the cave, she did fight in an even more savage manner than Mikaichi and she fed upon the bodies for the longest as well.