Sionn is the king, and father of the two boys that the story centers around. It is in fact, because of him that the difficulties arise to begin with. When the boys are still quite young, Sionn sends off his youngest son to prevent there from being any fighting for the throne when the boys are older. Fearing the same problems that arose between him and his two younger brothers, he decides this is the only possible course of action to leave peace in his kingdom. He could never foresee just what this decision would lead to.