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.

Combined with a few of the other Holiday Dragons, Merry Isis is somewhat of a parental figure simply for the capability of helping make food that needs to be cooked come breakfast and dinner time. Midday is spent hunting to help bring meat to the table to be cooked.

Unfortunately, due to his having an important role, Merry Isis is none too fond of ever being treated like a pet. It's never been brought up once that he should help pulling a sled of any kind, often helping simply because the perfect payment is a bag of cherry—flavored hard candies once a week.