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.

Seigetsu is a proud member of the Kyokos Vale Defense Force. She learned from her parents that the best way to deal with problems is to head them off quickly. She values forethought, and while others waste time complaining, she quietly steps in to take corrective measures. Seigetsu still isn't sure how she ended up with such an impulsive mate, but Heiji's heart is in the right place, and she loves him for it. They often go on patrol together.