Khan Ti Long (last parts are Emporer Dragon in chinese)
Age unknown, but he is old enough that his eyes changed in to the swirling golden they are, and his mane is now a silvery grey (used to be a dull red).

Originally created for a muck as the last surving dragon of his kind. He was easily older then anything short of a god. However he choose to live life as a teacher of magic, and sage. He also choose to live in isolation, keeping to himself.

On a side note he had a quirk. If he consumes any kind of drink with alcholal... he tends to fall over asleep. (Think Doc Brown of Back to the Future movies). Also he tends to downplay is power by pretending to be incompant, like say using a fireball to open a door.

Art was done by this person here. http://wingedsonar.deviantart.com As a gift. It is currently the only color picture I own of Khan that got the eyes right, and is most flattering.