Mutamore Dragons are a mostly solitary breed, preferring to be alone in the waterways of the world for most of the year. However, when winter begins to wane, these normally grouchy dragons undergo a massive personality shift and become excessively chipper and incredibly social with the solitary focus of pairing up themselves—and other—dragons. They become such annoyingly happy and persistent match-makers that other dragons have been known to pretend to be pairs when one is in the area, just to avoid the attentions of the Mutamore Dragons. This temporary pairing up tends to lead otherwise disinterested dragons into a better appreciation of one another, resulting in lasting relationships. This has given the Mutamores the false reputation of being good at match-making.

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.

True to his breed, Lullaby likes to be left alone and will often hide himself (badly) in order to get some alone time. That doesn't stop curious and annoying hatchlings from tracking him down and having a bit of fun with the big grump. Rosemary yells at him a lot to take it easy on the children, but Lullaby sometimes cannot help himself. They just get too annoying and it sets him off. Aphrodite is the only one who seems to be able to get close enough to him to calm him down before he eats one of the smaller dragons. There is a legend that he almost bit off Credinta's wing and hit Ase with it as a hatchling because he got so angry with them. It is best to give him his space...unless you're Aphrodite.