Frilled Dragons are smaller than most other breeds, but when threatened, they stretch out their wings and frills to appear larger. They generally do not like to fight and prefer hiding to confrontation. Frilled dragons live in small groups and often band together to scare off potential threats. Males also use their frills as a way to attract mates, with those displaying the “best” frills being more likely to breed.

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.

Concealed Legend was born not long after the first Frilled dragon is found on this land. Back then, almost all cave owners want to get a Frilled egg. Concealed Legend's mother couldn't make a stand against the attackers, and was later killed by them. She was rescued by Phantom who just came by, when the crazy cave owners were about to tear the egg into pieces. She was well-cared in the cave, and is hidden from the general public until she matures, in case that some may want to steal her from the cave. Currently, Concealed Legend is the leader of the Frilled dragon gang in the cave that she was raised.