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.

When spring changes, the Seasonal Dragons change along with it. This is exactly what happened to Eorulio. The clan had rescued his egg near a cliff, where snow was melting. He was raised nicely, but he always remained afraid of his caretakers. But he changed when spring arrived. The clan knew what his behavior was from. He was a Spring Seasoal Dragon.

Eorulio is only playful with others when it's his favorite season. If it wasn't, then he would always stay timid. Eorulio also has a tendacy to act as if the world was ending when he's scared. His favoirte colors are pink and green.