Daydream Dragons are the hosts of daydreams and fantasies. They spend the majority of their time sitting on clouds, dropping daydreams down into the minds of people passing by. Humans who live near Daydream Dragons must be especially careful not to let their thoughts wander, or they could end up spending hours or even days in a trance-like waking dream state.

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.

There are a few dragons in the world that are known to be quiet, polite, and sweet; until they are angered, that is, and become fierce beasts of unexpected strength. Fortunately, good-natured Miruyi isn't quite one of these dragons; most of the time she simply squanders about with her airy head in the clouds. However, when the rare occasion of being angered arises, Miruyi can become a flustered, yelling creature of fury. (It is a shame nobody can really take her seriously when she has these moments.) Still, Ruyi's softer side appears far more frequently than her mad one; she has a prominant romantic streak, but very immature regarding love and tends to flee rather than confront romance head-on.