content: 
  ===House Martell===
  * '''Tyene Sand''' (seasons 5–7) portrayed by Rosabell Laurenti Sellers. Rosabell Laurenti Sellers Tyene Sand is the daughter of Prince Oberyn Martell by Ellaria Sand. Tyene is fiercer than she looks, especially with her twin daggers. She assists her mother in her plot to assassinate Myrcella Baratheon as revenge against Cersei, whose actions led to Oberyn's death. In the ensuing fight with Jaime Lannister and Bronn, she poisons Bronn by striking him with a poison-coated dagger before they are all arrested. In the cells, she strips in front of Bronn to hasten his heartbeat as well as the poison's effects, though she shows him mercy and gives him the cure. She later synthesises a similar poison for Ellaria, who uses it to poison Myrcella. She gives Ellaria the antidote before she too is killed. When Doran finds out, Tyene kills Areo Hotah while Ellaria stabs Doran in the chest. Tyene subsequently watches her own uncle die without remorse. She is later present when Ellaria meets with Olenna Tyrell to discuss an alliance with Daenerys Targaryen, where she is silenced by Olenna before she can speak. While journeying to Sunspear with her sisters and Ellaria aboard Yara Greyjoy's ship, Tyene is captured by Euron Greyjoy while defending her mother and taken as a captive aboard his flagship, ''Silence''. Given as a gift to Cersei, Tyene is chained with her mother in a dungeon. Cersei uses a version of the poison on Tyene and leaves her chained in front of her mother so that Ellaria can watch her daughter not just die but decompose.
  * '''Nymeria Sand''' (seasons 5–7) portrayed by Jessica Henwick. Jessica Henwick Nym Sand is the second eldest of Prince Oberyn's bastard daughters. Her mother was an Eastern noblewoman who brought Nym up to be cultured, graceful and deadly with a whip. She assists Ellaria Sand in her plot to assassinate Myrcella Baratheon as revenge against Cersei Lannister, whose actions led to Oberyn's death. Though she is briefly imprisoned by her uncle Doran for her treachery, Ellaria murders Myrcella, and Nym joins her in her coup by ambushing and murdering Trystane Martell. She is later present when Ellaria meets with Olenna Tyrell to discuss an alliance with Daenerys Targaryen, where she is silenced by Olenna. In Season 7, Nymeria accompanies Ellaria, Yara and Theon Greyjoy, and her sisters on the journey to Sunspear from Dragonstone. After they are ambushed by Euron Greyjoy and his fleet, both Nymeria and Obara confront Euron while Tyene protects Ellaria. After the Lord Reaper of the Iron Islands kills Obara, an enraged Nymeria attacks him with her whip, only to be choked to death and then hung from the prow of the ship with her weapon, next to her sister.
  * '''Obara Sand''' (seasons 5–7) portrayed by Keisha Castle-Hughes.Keisha Castle-Hughes A fearsome warrior, Obara Sand is the eldest bastard daughter of Prince Oberyn Martell. Her mother was a Dornish peasant girl who caught the eye of the Prince. She assists Ellaria Sand in her plot to kill Myrcella Baratheon as revenge against Cersei Lannister, whose actions led to Oberyn's death. Though she is briefly imprisoned by her uncle Doran for her treachery, Ellaria kills Myrcella, and Obara joins her in her coup by personally murdering Trystane Martell, her own cousin. She is later present when Ellaria meets with Olenna Tyrell to discuss an alliance with Daenerys Targaryen, where she is silenced by Olenna. In Season 7, Obaara accompanies Ellaria, Yara and Theon Greyjoy, and her sisters on the journey to Sunspear from Dragonstone. After they are ambushed by Euron Greyjoy and his fleet, both Nymeria and Obara confront Euron while Tyene protects Ellaria. Ultimately, Euron proves to be a more skillful fighter and ultimately stabs her in the stomach with her own spear. She is impaled at the front of the ship with her spear, next to her hanging sister, Nymeria.
  * '''Trystane Martell''' (seasons 5–6) portrayed by Toby Sebastian. Toby Sebastian Trystane Martell is Prince Doran's son and heir to Dorne. His father betrothed him to Myrcella Baratheon as part of the alliance offered by Tyrion Lannister, then acting as Hand of the King. He and Myrcella later grow to love each other and Trystane offers to ask his father if they can marry immediately. He is struck by Bronn when he and Jaime Lannister arrive to take Myrcella back, but Trystane later shows Bronn mercy and decides not to have him mutilated, satisfied with having Areo Hotah strike him in a similar manner instead. Doran allows Trystane to accompany Myrcella back to King's Landing to take his uncle Oberyn's place on the Small Council, but Trystane's life is put in danger when Ellaria Sand secretly poisons Myrcella just as their boat leaves Dorne. Though Jaime prepares to send him back to Dorne unharmed, Trystane refuses to leave, insisting on being present for Myrcella's funeral, so Jaime instructs him to stay on the boat for his own safety. However, as he is painting funeral stones for Myrcella, he is ambushed and killed by Obara and Nymeria Sand, his own cousins, sent by Ellaria Sand to kill him as part of her coup, though most believe his death was Cersei's doing.
  * '''Doran Martell''' (seasons 5–6) portrayed by Alexander Siddig. Alexander Siddig Doran Martell is the ruling lord of Dorne and older brother to the late Prince Oberyn Martell. Unlike his brother, Doran is even-tempered and deliberate. In season 4, he is invited to the wedding of Joffrey Baratheon and Margaery Tyrell, but due to suffering from gout, he is unable to attend and sends Oberyn in his stead. After Oberyn is slain by Gregor Clegane, Doran grieves but takes no action, claiming that Oberyn suffered a self-imposed death in a trial by combat, a legal act, and coldly rebutts Ellaria's proposal to harm Myrcella Baratheon to exact revenge on the Lannisters. However, after a skirmish in which Jaime Lannister and Bronn fight with the Sand Snakes over possession of Myrcella, Doran orders all locked up, including Ellaria. He later grants Jaime an audience and agrees to allow Myrcella to return to King's Landing along with his son, Trystane Martell, Myrcella's betrothed, while threatening Ellaria and the Sand Snakes with severe consequences should they defy him again. However, Ellaria later secretly poisons Myrcella despite Doran's warning. In the sixth season, Doran finds out about Myrcella's assassination, but he is immediately killed by Ellaria, while his men stand and watch as he dies.
  * '''Areo Hotah''' (seasons 5–6) portrayed by DeObia Oparei. Areo Hotah is the long-serving captain of Doran Martell's palace guard, renowned for his loyalty and his longaxe. He arrests Jaime Lannister, Bronn, Ellaria Sand and the Sand Snakes following their battle over Myrcella Baratheon, but releases them all on Doran's request. As retribution for striking Trystane Martell, Areo strikes Bronn across the face. In the sixth season, after Doran finds out about Myrcella's death at Ellaria's hands, he is stabbed and poisoned by Tyene Sand, and dies immediately.
  * '''Oberyn Martell''' (season 4) portrayed by Pedro Pascal.Pedro Pascal Prince of Dorne, known as the Red Viper. He is the hot-headed younger brother of Doran Martell, Prince of Dorne and Lord of Sunspear. A renowned warrior and traveler, Oberyn has eight bastard daughters, called the Sand Snakes. His sister, Elia Targaryen, was raped and killed during the Sack of King's Landing by Ser Gregor Clegane. In season 4, Oberyn arrives in King's Landing with his paramour, Ellaria Sand, to attend Joffrey's wedding in his brother's stead, and his meeting with Tyrion makes it clear that he has actually come to take revenge against the Lannisters for their role in the deaths of his sister, nephew and niece. At the wedding, Joffrey dies after being poisoned, and Tywin initially suspects Oberyn of having a hand in the murder since Oberyn has a past with poison chemistry, while Oberyn denies involvement and accuses Tywin of ordering Gregor Clegane to rape and murder Elia. The two reach a settlement when Tywin promises Oberyn a meeting with Clegane in exchange for Oberyn serving as one of the three judges at Tyrion's trial. At the trial, Oberyn implies that he is not convinced of Tyrion's guilt, and openly questions Cersei's testimony and asks Shae why Tyrion would tell her about all of his plans to murder Joffrey if he was the perpetrator. When Tyrion demands a trial by combat and Gregor Clegane is chosen as Cersei's champion, Oberyn volunteers to fight for Tyrion, proclaiming that he will exact his vengeance, starting with Ser Gregor. Martell valiantly fights Clegane, his superior speed making up for Clegane's size, and manages to wound him in the shoulder and the leg, flooring him. Refusing to kill him immediately, Oberyn furiously demands that Clegane admit to raping and killing Elia and her children, and that the order came from Tywin himself. Distracted for a moment, Oberyn is floored by Clegane, who – in a manner self-admittedly paraphrasing the murder of Elia – knocks out his teeth, straddles him and slowly gouges out his eyes, admitting to the rape and murder of Elia before crushing his skull. Tyrion is subsequently sentenced to death, but Oberyn's objective of vengeance was not in vain, since his spear is revealed to have been laced with the deadly venom of the manticore, which is slowly killing Clegane. Oberyn's death, however, throws House Martell into chaos, since Ellaria is driven insane to the point that she kills Myrcella Baratheon, Doran Martell and Trystane Martell (Oberyn's own brother and nephew, respectively) to get revenge against the Lannisters.