Þorgrímr

Thorgrím is Gísli's brother-in-law and the likely killer of his beloved friend Vestein — the killing that breaks the fellowship of the Westfjords and sets the whole tragedy of Gísla saga in motion. A man of standing, married to Gísli's sister Thordis, he is bound to the others by the marriages and sworn-brotherhoods that should make them allies and instead make them deadly. When Vestein is speared in the night, Gísli is certain Thorgrím did it — and on a dark autumn night he repays the killing exactly, stealing into Thorgrím's house and driving a spear through him in his bed, the very way Vestein died. But Gísli conceals his vengeance, and the concealment is what dooms him: when his own sister unriddles the verse in which he half-confessed, the outlawry comes down on him. Thorgrím is the hinge of the saga — the in-law whose killing of a friend turns sworn brothers into hunter and hunted.