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.

The sisters' distaste for one another, no matter how sincere it seems, is a ruse. One so well played even they believed it until the Battle of Blood Falls. Astartes and Eris eagerly joined into the fight versus Creorluna. Astartes joked that maybe she would get lucky and her sister would be killed. She never thought that this would be precisely what happened.

Astartes became half-crazed with grief, refusing to accept Eris death. She desperately carted her fallen twin around, hysterically hunting for a way to revive her sister. Shed have traded her own soul for her sister's life.

She found her solution in Leeta. With her power over the dead, Leeta pulled Eris back from death's embrace but at a great cost: Eris became a vampire. Despite this, Astartes was overjoyed.

The duo has close ties to Taint and Deana. The four are often found at summit of Celestiale Cascate watching the sunset through the churning mist of the waterfall, not saying a word but just enjoying each others' presence.