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.

Unitodellisuus means same as "Dream reality" in finnish.

Because of his daydream dragons ability, Uni's egg wasn't noticed until it hatched. And as the hatchling stood up, stomping broken eggshells, everyone knew Huurre was going to keep this dragon. Unitodellisuus grew up to be a fine young dragon, singing dragon lullabies to the hatchlings and luring passengers to sleep. He talks, singing the words, which amazes humans but annoys other dragons.