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.

Yumekumu is a playful Daydream Dragon who loves to tell stories to the children. She is a guardian alongside Yaximarlu and Kinarami; out of the three, she is the most playful. The hatchlings and newborns love to hear her stories, whisking them away to fantastic lands full of hope and wonder, the adults also like to stick around and listen after a long day of hunting. She doesn't go into 'fight or flight' situations, as she would be hidden with the kids if there was ever an attacker near the den.