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.

Jack's full name is six words long and contains digits as well as letters, so he's just known as Jack. He was given this long name according to clan tradition, but since he moved to Aquebecker, nobody would believe it's real, and one record office even left the name line blank until he "takes this matter seriously". He's never made trouble over that. An agreeable and easygoing dragon, Jack's philosophy is that people can't help but like you if you show that you like them, and that has worked well so far. He doesn't take sides in conflict because he finds it "boring", and that neutral stance and his benevolent nature can smooth things over between the disagreeing parties.