Blancblack dragons are a two-headed breed known for their hardiness and easygoing nature. They are omnivorous, with the cream head preferring to eat plants and the violet head preferring to eat meat, and can adjust readily to harsh climates. These dragons are sociable—both with other two-headed breeds and with single-headed dragons—and can often be found as adopted members of social dragon colonies. They are often considered symbols of balance and fairness, and likenesses of Blancblacks have been found in ancient ruins associated with law and justice. Females Blancblacks have longer tails than males, which they use as whips when defending a nest from predators.

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.

White and Purple is head of the Bravo Watch (or rather "heads" of the Bravo Watch), the law enforcement agency of Bravo Territory, and she's respected for merely surviving this long. She has a lawn. It seems ridiculous, and it is. White is the one who sees value in the patch of bright green in the drab desert of hardy trees and succulents, while Purple is apathetic about the lawn and goes along with White because she can't be bothered to argue about its lack of purpose. Other desert dwellers think the head of the Watch has some kind of unspoken plan, like this grassy field is important to law enforcement somehow, since not even high-ranking officers think it's here for no reason other than looking pretty. White and Purple can often be seen outside the Watch House, maintaining lawn order.