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.

Purotekutaa, as a Guardian Dragon, was named after the Japanese word meaning "Protector." He took on the name when protecting Kizoku Shima because he wouldn't call him anything else. Purotekutaa guards a nest by putting it in between his front paws. Staying as still as a statue, he waits until another dragon comes and takes over his shift. Even when he is off duty, Purotekutaa still hovers nearby. He keeps a lookout day and night, and no eggs were ever stolen under his care. Everyone basically refers to him as their father because he never stops keeping an eye on them until they are fully grown. Even then, he still stays by their side. Purotekutaa is a little overprotective.