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.

Bubble Shield is one of many Guardian Dragons in the Shield family. Of all of her siblings, she is considered the most responsible. She is most protective of the young ones, she keeps track of who goes where and why, and she keeps the scroll of the cave tucked in her horn at all times. She enjoys her work, but it often becomes rather overwhelming, as the number of dragons in the cave grows larger each day. Her only real help is her father, Sharp Shield, and her best friend Cortana (Skywing).

Bubble is usually serious because of all the work she has, but in her spare time she loves talking about her life with others. By doing so, she relieves the stress of the day. Her friends understand this, and almost always listen intently; she is very grateful for them and makes sure they know this.