Nocturne Dragons are a strange breed. Whenever light strikes their bodies, they are frozen in whatever position they were in. This leaves them vulnerable and they rely on camouflage to keep themselves safe. They are often mistaken for statues when in this frozen state, but Nocturne dragons do not actually turn into stone. Rather, they merely idle until the sun goes down. At night, these dragons come to life, proving themselves to be powerful fliers, although little else is known about their true behavior.

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.

Be'lze, short for Beelzebub, is a prince of darkness and reigns the night sky when all of the other dragons have gone to sleep.  He is known as the Blue Demon as he is never seen, even by Venus, another Nocturne Dragon in Avem's group.  All people and other dragons ever notice is a blue streak and a pair of glowing yellow eyes when Be'lze goes in for the kill.  When Avem has a job that requires silence and stealth, Be'lze is the one chosen for the job.