Ryman Frey is a grandson of Walder Frey, the eldest child of Ser Stevron Frey, Walder Frey's eldest child and heir to the Twins. He has three sons, Edwyn Frey, Black Walder Frey, and Petyr "Pimple" Frey. Ryman is a fat greedy drunk with a bad belly.

When his father dies from a wound received at Oxcross, Ryman becomes the new heir to the Crossing.

During the Red Wedding he kills Dacey Mormont with an axe. He then leads 2000 Frey men to assist the siege of Riverrun. During the siege he has gallows built right before Riverrun and parades the captive Edmure, claiming that he would hang Edmure should Riverrun not surrender. The Blackfish however doesn't surrender and Ryman has Edmure brought back to camp, only to put up the same facade the next day. When Jaime Lannister arrives to lift the siege, he takes a disliking to Ryman's method as they make him seem weak and sends him back to the Twins. On the way, Ryman's troup is attacked by outlaws, presumably the gang of Lady Stoneheart, and he is killed. When news of it reaches the siege camp, Jaime is bothered by the audacity of the outlaws who kill the heir to the Crossing not far from the Twins. Ryman's son Edwyn suspects that Black Walder is somehow involved in his father's death to become heir of the Twins.

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