Seasonal Dragons take on the characteristics of the season during which they are born. Thus, eggs that are laid in spring match the pink flowers and green buds of spring, and those that are laid in the summer grow to depict the bright green of the forest trees and the yellow of the sun. Eggs laid in autumn display the bright colors of leaves falling from trees, and those that are laid during winter take on the appearance of the icy snow.

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.

Uogie the Seasonal is the leader of his human master's clan of dragons. Although he is a seasonal, Uogie does not seem to share the warm spirit and festivities of summer. Instead, he nonchalantly directs the cruel mass-breedings and forced abandonment of eggs which he orders all of his subservient dragons to perform whenever he wishes. Strangely enough, despite his despotic role, he appears to be a very casual fellow with an easygoing nature. He maintains this easygoing demeanor even while dictating the next mass-breeding quotas (and punishments for failing to meet them) to his second-in-command, Ninemular JerikhovichMagi II. Some dragons speculate that he is so monstrous that nothing bother him, while others think that he is mentally ill or insane, failing to comprehend the absolute horror and cruelty of his actions. Either way, the ultimate goal of Uogie the Seasonal is clear: he wants to perpetually flood the abandoned pile with the common eggs of his oppressed subordinates.