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.

Nightsheene is the runt of her clutch, her brother growing up faster than she. She was abandoned by her clan for that reason. However, she is now the eldest of her new-found cave, so she does what she can to protect the younger hatchlings and eggs, working at night to hunt and defend. She can sometimes be temperamental and can complain a lot, but she's extremely loyal and sticks to her word. She is often seen as the 'leader' of the cave, even though technically the cave belongs to Krystalix.