Because of their dual personalities, Duotone Dragons are extremely nervous and indecisive. When confronted, it is often the case that one head wants to fight while the other wants to run, resulting in the dragon trying to go in two directions at once. They are omnivorous, choosing to eat both vegetation and meat—although perhaps this is just another outcome of their indecisiveness.

Both heads can control the body, with each head having only marginal control on the opposing side of the body; this works when both halves want the same thing, but does not work as well when there is a disagreement. Despite this, Duotone Dragons can fly quite well, but can crash through the trees if one head becomes distracted.

Duotone Dragons can fight, using their large claws and heavy face plates to rend and bash their opponents.

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 name "Duospark" refers to the dragon as a whole, while the red head prefers the name "Duo" and the purple one prefers "Spark" or "Sparky". Duospark perfectly fits the description of Duotone dragons in that he is incredibly indecisive. Duo tends to be more headstrong, often wanting to charge into battle at the slightest insult, while Spark is more of a thoughtful pacifist. Because of their conflicting tastes, Duo and Spark have agreed not to bother with romance, preferring to have each other as company rather than a mate or children.