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.

Gray dragons are the masters of the skies. They are excellent fliers and land only to rest and eat. In addition, they have full control of the weather. They are very hot-tempered and easily angered. They will attack any human that bothers them, conjuring strong winds and dangerous lightning.

Franzeruto is a descendant of a rare Gold Dragon, and because of this, he believes that he is superior to the other dragons of his family. Because of this, he does not show much respect to them, and he hates the annoying hatchlings that join the family almost every week. His egg was discovered by Argental, who insisted on keeping it and raising it as if it were his own child. His plan worked, and now Franzeruto is a permanent member of the family.