Guardian Dragons have large shields on the end of their tails. Although the shields appear to be heavy, they are light, yet nearly unbreakable. Guardian Dragons use their tail-shields, as well as their wings, to deflect attacks and protect others. Often, they will guard the eggs and hatchlings of a nest while others are away. They are generally peaceful, and will not retaliate unless necessary. They have no need to forage or hunt, as they are fed by those they protect.

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.

A noble and serene dragon, Dukeshield Blue is rarely irritated and even more rarely angered. He is often found basking in the sunlight outside of Deep's lair, seeming languid and complacent while actually maintaining a constant vigilance, though for what exactly Deep isn't sure- Duke refuses to elaborate. Out of all of Deep's dragons, Duke may be the only one who can tolerate Desert for long periods of time. Desert appears to take this as a challenge; however, through no real effort of his own, Duke seems to be winning.