Stone Dragons have a tough outer covering made of a stone-like material. They eat rocks, using the minerals they contain for nourishment and to keep up their stone outer shell. They rarely move, and are the heaviest of all types of dragons. Although they have wings, indicating flight ability, no one has ever seen a stone dragon flying.

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.

Stoni Deadly is an extremely lazy dragon. Ever since she was young, she has always felt heavy and thinks that it is pointless for her to move about, so most of the time she just sleeps or lazes around. She is irresponsible and unreliable. Trust her to pretend to be asleep or busy with something if someone asks her for help. She does not know how to fight or defend herself because she doesn't necessarily need to hunt for anything as she eats rocks and minerals. As a result, she is defenseless and clumsy. She never cares for anyone but herself. She is even too lazy to talk sometimes!