Split Dragons use their sharp teeth and wings to hunt large animals and rarely eat plants. They are intelligent dragons who enjoy mental challenges, preferably alone; Split Dragons are normally solitary except during mating season. When mating, many dragons come together in a group to raise their eggs and hatchlings. These groups tend to be very noisy—reminiscent of a thunderstorm—and last only until the hatchlings are capable of surviving on their own.

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.

Two-headed dragons are unique enough to deserve a separate classification from ordinary dragons. They have two necks, two brains, two mouths, but one stomach and one main body. The two heads usually work together, but there are times when they will fight each other, snapping back and forth. Their unique anatomy prevents them from breeding with single-headed dragons.

In Japanese, Rai's name means "Trust", and Rei's name means "Law". They were raised by Mamosuke and Emi after their egg showed up in the valley. Their parents are very honored that they were able to raise the boys, and love them very much. Both Rai and Rei are very calm, even-tempered dragons. It is very difficult to get either of them worked up. Both dragons also possess an innate ability to judge others accurately,  fairly, and to keep everyone else from getting over-stressed about it. As such, they have effectively become the judges of the valley, mostly keeping an eye on the misfit pygmy's and the young male dragons. The happiest day of their lives came in the fall when they ran across the two most beautiful dragons they had ever seen, Mina and Miya. A classic boys meet girls and fall in love story ensued, except the part where there is only two bodies and four dragons. They became mates, Rai with Mina and Rei with Miya. They all love each other so much and that will never change.