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.

Lee-kun is arguably one of the sternest, most stubborn-minded dragon in the Lucky Clan.  He is very opinionated, and is all but impossible to sway in an argument. Only his mate, the ever-serene Otsuki-chan, has been known to convince him to change his mind. He isn't very sociable, but can be a very good conversationalist when he wants to be. Otsuki claims that he isn't made entirely out of stone: that he does have a soft side. Apparently she's the only one who's ever seen that side.