 This deviates from the common belief that Won Gyun had always conspired against Yi.In the show, his jealousy and rivalry is portrayed in his later years as a veteran commander when he begins to show his arrogance as one of Joseon's strongest warriors, refusing to follow along with what he deems to be Yi's cowardly tactics and treachery to the king.His betrayal to Yi is explained through the show's ongoing politics and his inability to distinguish military merits from protection of the people.