Perhaps among the most venerated of dragon breeds is the Zyumorph, a breed whose selfless heroism and strong moral compass are nearly unparalleled by other dragons. Zyumorphs have an innate urge to fend off wrongdoing, and as such, are often sought after in times of peril. Although they are independently quite capable fighters, it is said that their true might is not unlocked until all six Zyumorphs are brought together in times of great duress.

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.

By the third time Tenderheart located a hatchling who claimed to be "lost," she knew the drill by heart. Raise the dragon until it could take care of itself, tell it that others like it existed, and then send it off into the big, scary world with no idea what would happen to it. Needless to say, she disliked the idea, but followed through with it anyway.

Or, at least, she would have, if not for the hatching of another hatchling just like Tamu. Tamu was just beginning to mature when her adopted younger sister hatched, and refused to leave Congo's side until she too was ready to take off into the yonder. This awakened Tamu's fiercely vigilant protective streak. Tamu spent her every waking moment assuring that Congo was well taken care of, nearly replacing Tenderheart as her mother. When Congo matured, Tamu felt as though she were watching her very own child grow to adulthood, and decided to let her take the lead and guide the duo to whatever strange place called them both up north.