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.

Two headed dragons are a special breed of dragons. They have two necks, two brains, two mouths, but one stomach and one main body. The two heads usually work together, but there are times when they will fight each other, attacking back and forth. They use their sharp teeth and wings to hunt large animals, and rarely eat plants. It is unknown what would happen if a two headed dragon were to mate with a one headed dragon, since it has never occurred. They only mate within their breed.

Originally, this dragon's name was Hermione. However, due to an accident in her hatchlinghood, the second head gained its own personality. Since this split personality demanded a name of its own, each head took half of their original name, creating 'Herm and Mione'.

Their personalities are as split as their name. Herm is the intelligent, curious one, while Mione is more reckless and has a well-hidden temper. When Mione wants to go into the forest and discover knowledge for herself, Herm would rather stay at the cave and question the older dragons about their experiences. Still, they have some traits in common, for example their thirst for knowledge, their drive for wisdom, and their absolute stubbornness.