Black Dragons are warriors. They are strong and capable in battles of force, but also ample magic users, capable of devastating opponents with their spells. Their bright eyes give them excellent night vision, which is why they generally hunt during the night.

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.

Kokyo grew up with Swellow. This means he became belligerent like her. However, it's a phase he never grew out of. In fact, it only really got worse when he matured and realized being a second-born male had benefits in a group of mostly females. As a result, he often fought Dedede for dominance, ignoring how 1) he was a little hatchling challenging a fully-grown earth dragon, and 2) the dominance all belonged to A-chana, who isn't a crunchy snack just because she knows how to break them all in fun ways. If Rocket Dog wasn't around, the chances of Kokyo dying from stupidity-induced injuries would have increased drastically. Now that he's grown up, Kokyo hasn't changed much. The only difference is that now he knows his limits...which means nothing, as he STILL instigates fights. The difference is that now it's less one-sided.