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  ===House Tyrell===
  * '''Olenna Tyrell''' (seasons 3–7) portrayed by Diana Rigg.Diana Rigg Lady Olenna, better known as "the Queen of Thorns", is the sharp-witted grandmother of Loras and Margaery. Considered Tywin Lannister's female counterpart, Olenna is a matriarch and the real power behind House Tyrell. She has very progressive views where she feels women should be more involved in politics and is accepting of Loras' homosexuality where the people of Reach have no problems with it. After asking Sansa directly what Joffrey is like, and believing Sansa that Joffrey is an abusive "monster", Olenna decides to protect both Margaery and Sansa. To prevent the other nobles from using her as heir of the North, Olenna secretly plots to have Sansa marry Loras. But her plan is foiled by Loras himself, who accidentally reveals it to Littlefinger's male spy in the brothel, who reports to Tywin Lannister. Tywin forces Sansa marry his son Tyrion and, to secure the Reach, orders Cersei to marry Loras. Lady Olenna is at first against Loras marrying Cersei because she says Cersei is too old, and because of the scandal of Cersei's incestuous affair with her twin brother, Jaime. Tywin threatens to make Loras join the celibate Kingsguard, which would make Joffrey and Margaery's children the heirs of the Reach. Olenna admits defeat and praises Tywin for outwitting her. In season 4, Olenna conspires with Petyr Baelish to have Joffrey poisoned, to protect Margaery from Joffrey's beastly nature, and advises Margaery to become acquainted with her new match, Tommen Baratheon, Joffrey's malleable, much younger brother and heir. She returns to Highgarden shortly afterwards. When Loras is arrested by the recently reinstated Faith Militant for his homosexuality, Margaery writes to her grandmother who returns to the capital in order to protect her grandchildren from Cersei's schemes. But, mistakenly believing Loras's arrest was simply meant to humiliate House Tyrell, she helplessly assists Olyvar's testimony which incriminates her grandson, as well as to Margaery's incarceration for perjuring herself in front of the gods (in an effort to protect her brother). Olenna later confronts the High Sparrow without results and has a secret meeting with Littlefinger who, blackmailed by Olenna for his part in Joffrey's death, and in order to placate his role in her grandchildren's imprisonment in providing Olyvar to Cersei, gives valuable information about Lancel and Cersei's adulterous relationship. This results in the arrest of Cersei by the Faith Militant. In the sixth season, Olenna takes steps to free Margaery from the High Sparrow and retake power from the Faith Militant, but the plan is thwarted when Tommen forges an alliance with the Faith and becomes the High Sparrow's new puppet. Margaery feigns loyalty to the Faith and manages to instruct Olenna to leave the city when the High Sparrow threatens her life. After hearing of the Great Sept of Baelor's destruction, which killed Mace, Loras and Margaery, Olenna vows revenge. She accepts an invitation to Dorne by Ellaria Sand, who reveals that she has followed Yara Greyjoy in declaring for Daenerys Targaryen. Seeking vengeance against Cersei for her slain family, Olenna pledges the Tyrell forces to Daenerys as well. When the Lannisters, supported by the turncoat Tarly forces formerly loyal to the Tyrells, attack Highgarden, they win with ease. Jamie Lannister finds Olenna in her tower, ready to be taken captive or killed. Jamie tells Olenna that Cersei had dreamed up horrible deaths for her but that he had persuaded his sister to let him offer Olenna poison instead. After drinking the poison Olenna confesses proudly to Joffrey's murder.
  * '''Mace Tyrell''' (seasons 4–6) portrayed by Roger Ashton-Griffiths, Roger Ashton-Griffiths is the Lord of Highgarden, Defender of the Marches, High Marshal of the Reach, and Warden of the South, he is the buffoonish father of Loras and Margaery, and Lady Olenna's son. Lady Olenna has a low opinion of Mace, whom she calls "Lord Oaf". Originally Hand of the King to Renly Baratheon before the latter's death during the War of the Five Kings, Mace agrees to a Lannister-Tyrell alliance as proposed by Petyr Baelish. He is named Master of Ships on Joffrey's Small Council, and attends Joffrey and Margaery's wedding. After Joffrey's death, Mace serves as one of the judges at the trial of his accused murderer, Tyrion Lannister. He is later present at Tywin Lannister's funeral and at Tommen and Margaery's wedding, and, in spite of offering himself as Hand of the King to Tommen, he is instead named Master of Coin by Cersei who, in the aim of keeping him away from the capital while she schemes against his daughter, sends him to renegotiate the royal debt with the Iron Bank of Braavos. He later arrives in Braavos, and is unsuccessful in his attempt to win over Tycho Nestoris, who is unimpressed with his buffoonish ways. In the sixth season, he returns to King's Landing with the Tyrell army to free Margaery from the Faith Militant alongside Jaime Lannister, but is foiled when Tommen forges an alliance with the High Sparrow. He is later killed in the destruction of the Great Sept of Baelor after being horrified, but unable to protect his son as he was mutilated by the Faith Militant.
  * '''Loras Tyrell''' (seasons 1–6) portrayed by Finn Jones. Finn Jones Ser Loras Tyrell, known as the "Knight of Flowers", is a highly skilled knight and jouster. Known across Westeros for his beauty, he is Renly Baratheon's former squire and secretly his lover. He is widely known throughout Westeros for defeating Jaime Lannister in a jousting match. In Season 1, he charms Sansa Stark before his jousting match with Ser Gregor Clegane, but even though he wins, Clegane attacks him in a blind rage and he is only saved by Clegane's brother, Sandor, who Loras names as the champion in gratitude. In private, while shaving Renly, Loras makes it clear that he disapproves of both Joffrey and Stannis as Robert's closest heirs, and tells Renly that he would make a great king. In Season 2 when Renly makes his claim for the Iron Throne, Loras and the rest of House Tyrell back his claim and cement their support by marrying Loras's sister Margaery to Renly. Loras and Renly remain inseparable even after Renly's wedding. After Renly's assassination, Loras goes berserk and vows vengeance against Stannis, but secretly blames himself for having pushed Renly to make his claim even though he was lawfully behind Stannis. When the Tyrells join the Lannister cause against Stannis, Loras fights wearing Renly's armor in honour of the fallen king at the Battle of the Blackwater. During season 3, his family plots to have him marry Sansa for Sansa and his family's benefit. However, he accidentally reveals this plot to his new lover and squire, Olyvar, who is actually a spy for Lord Baelish. Tywin stops the Tyrell plot by having Sansa marry his son Tyrion and engages Loras to his daughter Cersei. In season 4, at Joffrey and Margaery's wedding, Loras exchanges banter with Jaime, who warns Loras that if he marries Cersei, she will likely kill him in his sleep, and that he will never marry her. Loras counters that Jaime will not marry Cersei either, implying that he knows of his incestuous relationship with Cersei. He is later present at Tyrion's trial for murdering Joffrey, though he is apparently unaware that his grandmother, Olenna Tyrell, is the true killer. In season 5, he attends Tywin's funeral and offers his condolences to Cersei. He continues his sexual relationship with Olyvar, flirtatiously suggesting that they should move to Dorne, where homosexuality is more tolerated, and expresses doubt that to Margaery that he is still obliged to marry Cersei with Tywin gone. He is later present at Tommen and Margaery's wedding and, during a training session, is suddenly arrested for his homosexuality by the recently reinstated Faith Militant. He denies all of the Faith's allegations against him, including his affair with Renly, during an inquest presided by the High Sparrow, but eventually loses his temper when Olyvar testifies against him, citing his birthmark "in the shape of Dorne" he has on his thigh as proof. This prompts the Faith to incarcerate both him and his sister, the latter for perjuring herself in front of the gods in an effort to protect him, and to open formal trials for them. In the sixth season, after being tortured for almost a year, Loras admits to his "crimes" on the day of his trial and joins the Faith Militant in order to survive and a seven-pointed star is carved on his forehead. Though he is accepted into their ranks, he is killed when the Great Sept of Baelor is destroyed by wildfire on Cersei's orders.
  * '''Randyll Tarly''' (seasons 6–7) portrayed by James Faulkner, is the Lord of Horn Hill and the head of House Tarly, a vassal family of House Tyrell of Highgarden. Randyll is the father of Samwell Tarly, and one of the greatest soldiers in Westeros. He has a humorless martinet, is severe and intimidating. He demands martial discipline in the field and in his home. He forces Sam to join the Night's Watch on threat of death. In the sixth season, he is not pleased when Sam returns to Horn Hill with Gilly and his supposed son with her, and enraged when he realizes Gilly is a wildling. Despite his hatred for the wildlings, Randyll agrees to let Gilly work in the kitchens and raise the baby as a bastard of House Tarly, on the condition that Sam never again set foot in Horn Hill when he leaves for Oldtown. Sam ultimately takes Gilly and the baby with him, and takes House Tarly's ancestral Valyrian steel sword, Heartsbane. In the seventh season Jamie Lannister persuades Lord Randyll to side with the Lannisters against the Tyrells. This goes well initially as the Tarlys help capture Highgarden, but when Daenerys ambushes the Tarly and Lannister forces they are soundly defeated. Daenerys demands that the Tarlys and their few surviving soldiers, now captives, bend the knee. Randyll refuses and is executed by dragonfire.
  * '''Melessa Tarly''' (season 6) portrayed by Samantha Spiro. Lady Melessa of House Florent is the wife Lord Randyll Tarly of Horn Hill and mother of Samwell Tarly of the Night's Watch. She is a sweet, plump, and adoring mother, and has a soft spot for Samwell. When Sam returns to Horn Hill with Gilly and her baby on the way to Oldtown, she greets him warmly, and becomes infuriated when Randyll insults Sam and Gilly during dinner.
  * '''Talla Tarly''' (season 6) portrayed by Rebecca Benson. Lady Talla is a kind, friendly and unpretentious woman, and is the sister of Samwell Tarly. She greets Sam warmly when he returns to Horn Hill with Gilly and her baby on his way to Oldtown.
  * '''Dickon Tarly''' (seasons 6–7) portrayed by Freddie Stroma in season 6, and by Tom Hopper in season 7. Tom Hopper Dickon is athletic, a good hunter, an excellent swordsman, manly, not particularly bright but the favorite child of his father, Lord Randyll. He is the younger brother of Samwell Tarly, but was pronounced heir when Samwell was sent to the Night's Watch. He greets Sam warmly when he returns to Horn Hill with Gilly and her baby on their way to Oldtown, but his dismissal of Sam's claims that he killed a White Walker is what leads Randyll to realize Gilly is a wildling. Dickon acquits himself well enough in his first real battle, but his second - against Daenerys, her Dothraki and her dragon - ends in defeat. Captured, he is urged by his father to bend the knee to Daenerys and save himself, but instead he stands with his father in refusing. He is executed by dragonfire.