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.

Ailpein lives in the Scottish Highlands at the base of Ben Nevis, or "Beinn Nibheis" as he calls it. In the short amounts of time that he is awake, he likes to hunt with his mate Sorcha, his children, and his extended family, as he is very close with all of them. He rarely associates with unrelated Pillow family groups, but only because that's the way things are among his kind where he lives. The only time he will associate with them is on extremely cold days and nights when all the Pillow dragons huddle together to keep warm.