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.

Aegdae was the first dragon to make any romantic moves towards a female of the Digi Clan. The fell shadow was brought in by Haikagura as an egg and raised as the next in line to take over Haikagura's status in the Digi Clan, however Aegdae cannot bring himself to fight with other dragons, instead he seeks power through knowledge, and solutions through negotiations.

However, that is not to say that Aegdae cannot fight, he just prefers not to. The black dragon is well known through the clan for his vicious and nearly undefeated battle record. He is the sire of Guilin, and is proud of his daughter for choosing to walk her own path and find her own power instead of wallowing in self pity.