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.

Upon first glance, Concave seems to be a very intimidating, burly male who isn't afraid to go after what he wants, but he is quite the opposite. Concave is a shy, quiet dragon, and his large stature belies his sensitivity. He is very emotionally weak, and the slightest hint of annoyance or frustration in someone's voice when he is speaking to them will make him cower and whimper, wondering what he did wrong. He hardly ever dares to ask for something, for he is afraid that his neediness will inspire anger in whoever he is asking. Thankfully, his few friends understand him, and when he is around them, he is less shy and more outgoing.