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.

Often a quiet yet slightly energetic dragon, NT 3000 is one who is often mistaken with someone else in identity. Despite having a slightly greener tint to his scales than most Guardian dragons in Kim's care, NT 3000 is often mistaken for YoYo of the GGs Clan. The reasoning behind this is unknown by many, but there are rumors going about that the two are actually long lost twins. This rumor has not been confirmed and are often just said to be speculation by many. Whenever NT 3000 isn't causing havoc (like most rudie dragons—a name given to most gang-clan dragons—are wanton to do), he can be found racing against other dragons, doing extreme mathematical equations, or re-organizing Kim's giant archives with Mr. Fourth Alice.