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.

Born their oldest daughter and second child overall, Mari of November, or just Mari, and her brother Welliume are the only offspring of Wilfre the black dragon and Medilyre the white dragon to remain home rather then venture out into the world.

She is a powerful fighter like her father, while retaining small traces of the healing abilities of her mother. When she was in training to be a warrior, she met her mother's young medical apprentice, a male white dragon named Liste Markaleb. The two of them fell deep in love. Sadly, their first egg was abandoned and failed to hatch. However, they hope that some day they can be both successful workers and proud parents, just like Wilfre and Medilyre.