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  ===House Tully===
  * '''Edmure Tully''' (seasons 3, 6, 8) portrayed by Tobias Menzies. Tobias Menzies Catelyn and Lysa's younger brother and the Lord of Riverrun after their father Hoster dies during Season 3. A brash but good-hearted man, Edmure is not a good tactician but a skilled politician. To restore the alliance with Walder Frey, and to make amends with Robb Stark for unwittingly curtailing his plan to draw Tywin Lannister into battle, Edmure is promised to one of Frey's daughters, Roslin. Edmure and Roslin are wed and carried off for a "bedding ceremony", after which the Freys slaughter the Stark family in the "Red Wedding". He becomes a prisoner of the Freys after the death of his sister Catelyn and nephew Robb. When his uncle Brynden retakes Riverrun from the Freys, Edmure is used as a hostage to coerce Brynden into surrendering, but he refuses, while the Freys also refuse to kill Edmure. Jaime Lannister later meets with Edmure and falsely threatens his wife and baby child with death if he does not persuade Brynden to stand down. He is subsequently released and allowed into Riverrun, where he gives the order to surrender. The Lannisters and Freys retake the castle and Edmure is taken captive once more to ensure the Tullys' loyalty. He reappears in the series finale alongside the other lords and ladies of Westeros as they decide on their new king.
  * '''Brynden Tully''' (seasons 3, 6) portrayed by Clive Russell. Clive Russell Commonly known as "the Blackfish", Ser Brynden is the uncle of Catelyn, Lysa, and Edmure, and a seasoned war veteran. He returns to Riverrun during season 3 before his older brother's death to make amends. He serves as both an adviser and confidant for both his niece Catelyn and grandnephew King Robb Stark. At Edmure's wedding to Roslin Frey at the Twins, Brynden excuses himself from the feast to "find a tree to piss on", and by so doing narrowly escapes the ensuing Red Wedding massacre when the Freys and Boltons betray the Starks. Lord Frey is visibly untouched by the man's absence, while Roose Bolton appears disturbed, aware that Brynden is capable of holding Riverrun (which has been granted to Lord Frey as payment) against the Iron Throne even with its technical lord, Edmure, in captivity. Brynden indeed retakes Riverrun from the Freys and holds it in Robb's name, refusing to surrender even when Edmure's life is threatened. The castle eventually falls when Edmure is allowed inside and gives the order to stand down. Brynden, however, refuses to surrender and chooses to fight to the death. He is later reported dead.
  * '''Roslin Frey''' (season 3) portrayed by Alexandra Dowling. Roslin Tully (née Frey) is Lord Walder Frey's daughter and considered the most beautiful one. She was previously the intended bride for Robb Stark, who was unaware of her beauty and went on to marry Talisa Maegyr instead. She is married to Lord Edmure Tully as compensation at what becomes known as the Red Wedding. In the sixth season, it is mentioned that Roslin has given birth to Edmure's child.