Hellhorse Dragons are foul-tempered, spirited creatures with tempestuous and violent dispositions. Torrents of scorching flames erupt from their bodies and can easily set their surroundings ablaze. Highly aggressive and territorial toward other dragon species, Hellhorses will tolerate others as long as they believe the association to be beneficial. Such alliances are tenuous in nature and frequently short-lived, as the slightest disagreement can easily escalate into a full-out brawl.

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.

Dream-Eating Monochrome Baku is a very odd, perhaps creepy, dragon. For a start, he is not monochrome; far from it, for his wings and flames glow fiery orange. But that part of his name can be explained by the fact that his father is Lord Monochromacorn. The strangest thing about Baku is his infamous tendency to appear in other dragons' dreams, stalking them and promising them wonderful things every time they sleep until, more often than not, his unfortunate victim approaches him in the hope that he will grant their wishes. At this point, it is rumoured, the devious Hellhorse lures them into his black-and-white dreamland, never to return. Certainly true is that only one dragon who has approached Baku after seeing him in their dreams has ever been seen again, leading to a string of strange disappearances around the Cave. Baku always denies all knowledge of the incidents, and prefers to pursue his career as a member of the Vocaloids, following the lead of his mother Miku's Game Of Life.