He looks and acts like the perfect friend but in reality he's a selfish, lying, possessive control freak who'll kill anyone he perceives as standing in the way of his goal. He can't stand to be left alone, he can't stand it when the center of attention moves away from him and he hates it when the chosen proves to be ungrateful. When he understands the chosen can't keep the promise and wants to go away, Jason punishes them by transforming them into a wax doll so that they won't abandon him.