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.

Black dragons are warriors. They are strong and capable in battles of force, but also ample magic users, capable of devastating opponents with their spells. Their bright eyes give them excellent night vision, which is why they generally hunt during the night.

The only child in the rather odd pair of Kurosaki Ryumaru and Hisaki Ayame. Luckily, Ryoko seems to have inherited her mother's intelligence level, rather than her father's. She does enjoy a good fight, but she is wise when picking her battles, and tends to go for those who will provide an even fight. Other than fighting, she enjoys spending time with her mate, a gold dragon that goes by the name of Kaneshi Hikaru.