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.

Black Hole is an avenger. Being the only one of his kind around his friends, he prefers to stay hidden in the shadows and watch what happens around him. If he sees any threat around those he cares for, he'll kill them with no regret as long as he could protect his friends. Often left alone, he'd rather fly at night when others sleep so he can continue to be left alone. If interacted with, Black Hole is shy and usually silent. Others see him as brave and scary which helps him protect his friends, but doesn't help when it comes to making friends. He has found great peace with the other members of the Scroll though.