Blue-Banded Dragons are found primarily in mountainous regions with lots of precipitation. Although terrestrial, they are most often sighted near running water and feed mostly on fish. Females are very social and form tight-knit family groups, while males are strictly solitary and will fight any other dragons that enter their territory outside of breeding season. For this reason, females tend to drive males away when they are not ready to mate, or when they are caring for hatchlings. The amount of striping varies greatly from individual to individual, with some dragons having only faint dark streaks on their sides and others appearing to be almost entirely dark blue with paler markings.

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.

Hacci is the leader of a group of Blue-Banded Dragons known as the Haccius Unit, who deal with the distribution and trade of food in the Uncita clan alongside two other units, the Ora (Carmine Wyverns) and the Kitsama (Cassare Dragons). The problem is, these three groups have different ideals when it comes to how food should be given out, causing grudges to form between the units. The Haccius believe that food shouldn't be decided by age but rather by who happens to get in line first. Hacci is known for his serious and bitter demeanor among the Haccius but because of the solitary tendencies of male Blue-Bandeds, he often does things without considering any of his teammates' ideas, leaving the Haccius Unit in a very weak state.