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.

Orpheus the Dark sleeps during the day and awakens only after the sun has set. As one of the two Ruda Clan dragons who are only active at night, Orpheus is awake during the day only to attend important clan meetings, in which he does not speak. As a result, the Ruda Clan knows next to nothing about his personality. The only thing they understand for sure is that he hunts during the night and uses his sharp vision to look out for threats in the darkness. Orpheus thrives in the night, stalking his prey patiently until the right moment to strike. He is completely silent, as if he and the night were one and the same, earning him the name Orpheus the Dark.