Dragons are creatures with nearly unlimited life spans. They can survive for long periods of time, and no one has found a dragon that has died of old age. Adolescence 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. Once they hit adolescence, hatchlings change quickly, maturing to their full forms in only 2 years.

Dragons don't communicate with each other verbally, but they will growl to scare off predators and frighten prey. Young dragons will emit an extremely high-pitched squeal when they are frightened. To communicate, they use telepathy with each other and to speak to other creatures.

Gold dragons are the ones most often killed by humans, who consider their scales to be extremely valuable. These golden scales grant them a high level of protection, similar to armor, and they use this to their advantage in battle.

His fellow dragons suspect that XAU is part Mint Dragon, as his shyness is more characteristic of the Mint species than the Gold. He insists it is due to the attention he receives wherever he goes, claiming that life is difficult enough as a rare dragon, much less a rare Gold Dragon. Still, he manages to hold his own well enough, carving out a secluded life with his mate, Goldilocks. Her good nature helps ease his fears when he is forced to become a part of a crowd.