Dragon Meister

A Dragon Meister is a person who serves as the mortal vessel for an Eternal Dragon which dwells within any given set of Dragon Balls. It allows a person access to incredible amounts of energy, and all new powers or abilities which they couldn't have hoped to achieve prior to fusing with the dragon, though their powers and skills all vary depending on the kind of relationship they have with their dragon.

Trivia

 * This idea came to me after being inspired by the Jinchuriki of The Naruto Franchise. The idea of a human letting an enormous beast of immense power dwelling inside them is equated to the Jinchuriki idea, and a multitude of a Dragon Meisters powers is also based upon the Jinchuriki's.