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.

Yuki and Yuri are "Snow and Lily" in Japanese. The left head is Yuki, while the right is Yuri. Both are a rather odd couple, Yuki being curious, playful, and outgoing, while Yuri likes to sit back and think everything over. Despite their differences in personality, the two are tied together with the deepest of bonds. Their two personalities can also be a benefiting factor, though none have seen it yet. Often Yuki will nip playfully at Yuri, and the two can be seen "playing" together, their body resting comfortably while the heads take turns doing playful strikes and nips. She always makes the day seem brighter around the cave where she, her owner, and adopted siblings live.