Red Dragons are similar to typical story book dragons. They shoot flames, can fly, etc. However, they aren’t evil creatures as depicted in myths and won’t go around raiding castles, killing knights, or kidnapping princesses. They live in a variety of habitats, from forests to coastlines to abandoned castles, usually in warm climates, and eat whatever living creatures they can find.
Nah'ruk is essentially the trainer for the future defenders of the Moonsong Clan, though all dragons, excepting those who refuse to fight, go through at least basic training. He has a brash personality and though he is smart, he lacks all subtlety.