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.

Subgroup habitually challenges everyone who disagrees with him to fight him, or in situations where the opposing dragon clearly outmatches him, threatens to "time-displace" them with his hoard of Time mana. He can fight and is a passable magic user, but whether he should be so impulsive is another issue. Subgroup's two friends, whom he made with great difficulty, stay with him nearly every hour of the day, since they feel he puts himself at risk by acting so brashly.