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.

Indigo, the left head, is well-spoken and keen; few subjects escape him, and he can maintain a conversation even if his knowledge of the subject is lacking in comparison. He has a firm grasp on and even a slight obsession with numbers, and he tends to collect the amount of things that he sees and store for no specific purpose other than to have that number. Ocean, however, is not very scientific at all, and while Indigo counts he will often amuse himself with some stone or find a strange pattern in the ceiling. More than once this has caused Ocean to forget himself and allow the half of the body he controls to relax entirely, typically resulting in the beast falling over mid-conversation and ending in a small spat between the two.

They will never fly because Ocean is deathly afraid of heights, and refuses to be persuaded otherwise no matter how Indigo may coax him.