Pillow Dragons are covered in enormous amounts of fur affectionately referred to as fluff. Despite their deceivingly large size, they can still fly even with such tiny wings because their bodies are remarkably light. Pillow Dragons have a habit of sleeping for up to eighteen hours a day, waking only in short bursts. During their few waking hours, they take the time to hunt for prey. Once a pillow dragon becomes an adult, its fur grows very slowly. Pillow dragon fur is used to make very expensive and valuable cloth known as “dragon cashmere.”

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.

Wintertime Dreams is a pillow dragon. Her fluffy coat is very long, and she loves to play out in the snow around the mountaintop her clan calls home. A winter lover, she will often sleep 22 hours a day during the summer, watching the bees buzz around while she lazily lounges in the cool depths of her clan's dragons' cave. However, during the winter, she is awake nearly half the day, prancing around the chilly ice and watching the snow fall from the gray sky. Although Summertime Adventure and she are adopted 'sisters', she is completely opposite from Wintertime Dreams, preferring the summer. This interesting contrast has led to quite a few differences among the two "Seasonal Sisters".