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.

Dissilo came from the Susurro Clan, a clan that was thought to exist only in myth. 'Susurro' means 'Whisper', and the clan consists entirely of Seasonals, famous for their ability to 'talk' to the trees through soft, barely audible calls and chirps, hence the name of their clan.

Dissilo left the clan when he grew up, wanting to see the world. He was captured by the Herachus Clan, but was soon released when deemed not a threat. Dissilo decided to stay, and when given a position as a scout he quickly proved his worth in his ability to connect with the plant life, allowing him to track down the best source of food. He joins the group of scouts during these searches and is even teaching them how to talk to the trees as well. He is impressed with Cadifor's fast learning and thinks it must be because he came from another clan.