Despite their great size and strength, Celestial Dragons are a peaceful breed named for their spectral, starry appearance. Little else is known about them, as they spend the vast majority of their lives partially phased out of the plane of existence through the use of powerful magic. Celestial Dragons are thought to assume their corporeal form only long enough to reproduce or to die; the rest of the time, they resemble living, breathing constellations, impervious to all physical and magical harm.

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.

Starcill has a group of stars on his back that closely resemble the Gemini constellation. Because of this, he calls himself a Gemini, and acts accordingly. One moment he could be totally carefree, playing with the younger dragons, an the next he could be sitting alone in a corner of the cave, speculating about the universe. His emotions are known to change quite quickly, but he has never been known to suddenly be angry or fierce for no reason.