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.

Although named after a boy and girl couple, Nana and Popo are both female. Popo, the left head, is a little shy, and tends to think things through a lot. She likes to play mediator when to comes to fights. Nana, on the right, is more impulsive, and will speak her mind loudly (it's thought that this is a carry over from her puppy crushes in the past, since both male dragons around at the time weren't exactly great role models). They squabble a lot, but in the end, they're happy they ended up on the same body, and if given the choice, would always choose the other to be stuck with. They're both pranksters, however, and found it hilarious to mess with A-chana's mind once Nana changed her colors.