Sunstone Dragons are named after the orb on their tails, which resembles the gem of the same name. Their social structure resembles a lion pride, with one dominant male and several females banded together with their young. They prefer arid climates where they can blend in and dig for minerals and gemstones that they not only collect, but eat. The more gems they consume, the larger their tail stone grows. They are an aggressive breed; it is not uncommon to see two males battling for mates and territory.

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.

Lunear was a very serious dragon the opposite of IIgnieel. Kacie was Lunear's partner. Kacie not being a dragon, but a human taught Lunear how to fight, defend, and even some strategy, the requirements for an average dragon. Lunear was all for combat and that seemed to be enough for him. Lunear ranked as a normal dragon, despite his size, but what brought him up there was his knowledge.