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.

Stone dragons have a tough outer covering made of a stone-like material. They eat rocks, using the minerals they contain for nourishment and to keep up their stone outer shell. They rarely move, and are the heaviest of all types of dragons. Although they have wings, indicating flight ability, no one has ever seen a stone dragon flying.

Alexandros is the oldest dragon and the leader of the Ruda Clan of dragons, a young clan that is beginning to thrive as its numbers increase. Leader by necessity and not by choice, he feels it is his duty alone to protect the clan, much to the irritation of the other dragons. Known to other clans and humans as Alexandros the Unmoving, he is known for never leaving the field of battle when defending the clan's territory. Although still young and has many children, he has already chosen his adopted daughter Minato the Passive as the successor to clan leadership in the event of his death.