Harvest Dragons are a large, flightless breed most often found in heavily forested mountains. Normally shy, these omnivorous dragons keep to themselves in remote regions, but in the fall they descend from their high territory to search for food—and lots of it. During the autumn months, harvest dragons will eat whatever they can find, from large and small animals to nuts and fruit. In the winter they retreat into large caves and hibernate until spring, living off the fat they have built up.

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.

Shuukaku is the glutton of the group, he loves eating massive amount of food a day and never seem to be full for long. However, to prevent himself from wasting away the group's food supply, he tend to eat the foods that he hunt himself. Contrary to his massive appetite, he is actually very fit as he works out quite regularly due to his hunting, allowing him to develop his leg muscles and making him one of the fastest dragon on land among the group. His legs are also his primary asset in battle as a kick from him can easily crush the bones of his enemy.