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.

Gaia, or Crius as he is most often known, is the caretaker of the land that Kaini's clan lives on. He lovingly tends to every little thing, from the grass that covers the clearnings to the tallest trees. Crius has a love of anything that grows, and as such spends a lot more time in the forest than he does socializing with the other dragons.

He has little to no interest in finding a mate, and his only friend in the clan is the dragon Halcyon autopilot, Hal.