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.

Fluffy and extremely lazy, Pluton looks like a huge, floating, puffy ball of fur when he flies around. He is so lazy that Ysera has caught him falling asleep even in mid-flight! He falls a few feet, wakes up, stabilizes himself, and promptly falls asleep again. This action gives the impression that Pluton is actually "bouncing" in the air. He is often seen with Myhr, the female pillow dragon, Arbelyth, the female stone dragon, and most other slow-moving dragons like himself. Feisty, energetic dragons tend to wake him up. He also makes it a point to stay away from Arachion, the male magma dragon. Arachion once accidentally set his fur on fire, an experience Pluton hopes never to repeat again.