Holiday dragons are a very mysterious breed. They are only seen during winter, and even then it is hard to catch a glimpse of one. They are responsible for the general cheer that spreads during the holidays. In essence, they are the “Spirits of Winter.”

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.

Eruku is the first christmas dragon to be born in his cave. He, Tenshi and Inju are usually together as a group and since he was the first one born. He's the leader of the group. He is also the only male in the group, at least for now. Eruku is caring and playful but is also alert of his surroundings and even more when they are in unknown grounds. He and the others get along with the other dragons of the cave but they prefer to be alone and only join them truly when it's snowing.