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  ===House Frey===
  * '''Walder Frey''' (seasons 1, 3, 6–7) portrayed by David Bradley. David Bradley Lord Walder Frey, nicknamed the "Late Lord Frey", is the head of House Frey, Lord of the Crossing and bannerman to House Tully. He is known for outliving his many wives (now on his 8th) and siring over 100 children (both bastard and trueborn). Because the use of the Twins became a strategic necessity for Robb's host, Walder was able to negotiate marriage contracts for his children to Robb and Arya Stark. But during Season 2 Robb broke his word and married Lady Talisa. For this slight, and willing to take advantage of the war's changing fortunes, he conspires with Tywin Lannister and Roose Bolton to betray Robb Stark at the wedding of his liege Edmure Tully, which he insists in return for support of his men. Frey hosts the infamous "Red Wedding" at which Robb Stark, his wife and mother are all murdered, refusing to spare Robb even as Catelyn holds Lady Frey hostage and threatens to slit her throat, which she does. He is subsequently granted Riverrun and its lands (though the title Lord Paramount of the Riverlands passes to Harrenhal and House Baelish) and expresses delight to take another young wife, but his house is irredeemably tarnished by the betrayal and House Tully's vassals refuse to submit to his rule. In Season 6, he is outraged when he hears of the Blackfish recapture' of Riverrun and blames his sons Lothar and Black Walder for allowing him to escape. He then orders them to retake the castle using Edmure Tully as a hostage. Though they successfully retake Riverrun with the help of a Lannister host led by Jaime Lannister, Walder is ambushed shortly afterwards by Arya Stark, who slits his throat in revenge for the Red Wedding. In Season 7, Arya uses Walder's face to deceive and poison the rest of his family.
  * '''Lothar Frey''' (seasons 3, 6) portrayed by Tom Brooke in season 3, and by Daniel Tuite in season 6. One of Lord Walder Frey's many sons, nicknamed “Lame Lothar” because of his twisted leg. He and his half-brother Black Walder are sent by their father to Riverrun to propose a marriage between Lord Edmure Tully and Roslin Frey as terms for House Frey rejoining Robb Stark's campaign against the Lannisters. He is one of the first to commence the "Red Wedding", stabbing Talisa Stark in the womb several times and killing her and her unborn child. In the sixth season, he is ordered by Walder to retake Riverrun from Brynden Tully. Though they succeed with Lannister help, he is killed by Arya Stark, who subsequently bakes him into a pie.
  * '''Black Walder Rivers''' (seasons 3, 6) portrayed by Tim Plester. One of Lord Walder Frey's many bastard sons, nicknamed “Black Walder” for his dark demeanor. He and his half-brother Lame Lothar are sent by their father to Riverrun to propose a marriage between Lord Edmure Tully and Roslin Frey as terms for House Frey rejoining Robb Stark's campaign against the Lannister. He kills Catelyn Stark at the Red Wedding, after she slits Lady Frey's throat in retaliation for her son's death. In the sixth season, he takes part in the siege of Riverrun. Though the Freys reclaim the castle with the help of a Lannister host, Black Walder is killed shortly afterwards along with Lothar by Arya Stark, who bakes them both into a pie.