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.

Rainbow Delta, aka one of the "Dragonteers", is one of the most intelligent dragons in the Delta Clan. When he was little, his human honestly thought that Rainbow was a female, which led his human to naming him Rainbow. Rainbow Delta doesn't really mind being called an ex-female by the other dragons, but sometimes he thinks dark thoughts. There was an incident in his lifetime which led to him meeting his two closest friends, Spitfire Dream and Shiny Delta. With the three of them combined, they create the famous "Three Dragonteers". Rainbow Delta is a born member of the Delta Clan.