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.

Greyaki is very respected in IndigoButterflies herd. She often helps Nanaya protect the eggs but usually scouts around the nest, always ready for any unsuspected attacks. She is a defender, like most dragons of her kind, but she had her fare share in a battleground. She's levelheaded and loves the main female of the herd as a real sister, not forgiving anyone who hurts her, despite the fact Shirokai can heal herself. She fell in love with Shichu, the black dragon of the herd, but after two of the eggs disappeared and died, Shichu left her for the newest female of the herd. Greyaki didn't mind and just dedicated herself to protecting her only surviving son.