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.

Mint colored dragons are the most peaceful of all dragons; they only eat plants unless they scavenge meat from an already dead animal. They also have no ways to attack others or defend themselves. They are much smaller than other forms of dragons since they only double in size when they mature. Mint dragons are unable to use magic and cannot fly since they lack wings. Their looks have given rise to the common insult of calling dragons "large lizards."

Dearly is oddly inquisitive for such a small and vulnerable dragon. He finds it hard to leave interesting questions and happenings alone, and frequently ventures out of the nest to learn more about the world outside. When faced with trouble his one invariable course of action is to curl into a small ball, an approach that has left a frantic Kione and Wondrous to rescue him on a number of occasions. Undaunted by this, he dreams of showing the wonders of the big wide world to Luck Charm, who grew up with him, and bringing her out of her solitude a little.