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  ===House Baratheon===
  * '''Myrcella Baratheon''' (seasons 1–2, 5–6) portrayed by Aimee Richardson on season 1 and 2, and by Nell Tiger Free on seasons 5 and 6. Aimee Richardson The Royal Princess, Myrcella is the younger sister of Prince Joffrey and only daughter of Cersei Lannister. She, like her brothers, is also the child of her mother's brother, Jaime, though she remains unaware of this. Unlike her older brother Joffrey, Myrcella is a kind and good person and enjoys being with her uncle Tyrion who in turn dotes on his niece. As part of an alliance between House Lannisters and Martell, Myrcella is betrothed to Trystane Martell, son of Prince Doran Martell of Dorne, and sent to Dorne as a ward of House Martell. For over two years, she has been a guest and ward of Prince Doran, betrothed to his son, but her position has become tenuous with the death of Oberyn Martell, the Prince's brother. In season 5, Myrcella is shown at the Water Gardens with her betrothed, with whom she seems to have a good relationship. Unbeknownst to her, she has become a part of Ellaria Sand's plans for revenge although Prince Doran refuses that the young princess be hurt as part of their revenge against the Lannisters. Myrcella is nearly taken by the Sand Snakes but is rescued by the Prince's Guard. She later tells her uncle that she now considers Dorne her home and wants to marry Trystane. A while later, Prince Doran allows her to return to the capital with Jaime on the condition that Trystane accompany them, where he will become a member of the Small Council. On the jetty, about to board the ship, she forgives Ellaria Sand, who unexpectedly gives her a kiss on the mouth. On board the ship, Jaime awkwardly attempts to explain the true nature of his relationship with her mother, to which Myrcella responds that she already knows, having "felt" it for a long time. Jaime embraces his daughter, only to discover in horror that she is bleeding from a poison imbued orally by Ellaria. She collapses and dies in his arms. In season 6, her body is returned to King's Landing and laid to rest in the Great Sept of Baelor. Her funeral is attended only by Jaime and Tommen.
  * '''Selyse Florent''' (seasons 2–5) portrayed by Tara Fitzgerald.Tara Fitzgerald Selyse Baratheon (née Florent) is the wife of Stannis Baratheon who is kept locked in a tower on Dragonstone. She married Stannis sometime before the events of Robert's Rebellion. Selyse is a fervent worshiper of R'hllor and a supporter of Melisandre. She keeps the preserved corpses of her stillborn sons in jars in her chambers, seemingly even to Stannis's disgust, but expresses resentment over their daughter, Shireen, who suffers from greyscale and who Selyse sees as a demon, though she is only stopped from abusing her by Stannis. She later accompanies her husband to the Wall, and is present at the funeral of the Night's Watch brothers who died in the Battle of Castle Black. She witnesses Mance Rayder's execution and accompanies her husband on the march to Winterfell. After their army becomes trapped in a blizzard, she accepts Melisandre's advice to have Shireen sacrificed as a gift to the Lord of Light, only to recant in the last moments, refusing to stand by as her daughter burns to death. Restrained by Baratheon soldiers, she collapses in screams of agony. The next morning, Selyse hangs herself out of grief.
  * '''Shireen Baratheon''' (seasons 3–5) portrayed by Kerry Ingram.Kerry Ingram Shireen is the young daughter of Stannis Baratheon and Selyse Florent. Her face is disfigured by the disease Greyscale, but she is not yet crippled by it. She is a friend of Davos Seaworth and visits him during his captivity at Dragonstone with books, convincing him to teach himself to read, which he does. Though she does not get on well with Melisandre and has a bleak relationship with her mother, she shares a strong bond with her father, who loves her dearly. She later accompanies her father to the Wall, where she witnesses the funeral of the Night's Watch brothers who died in the Battle of Castle Black, as well as the execution of Mance Rayder, and also becomes friends with Gilly and Samwell Tarly. She is sacrificed to the Red God, when Stannis' army is stuck in a snow storm on the way to Winterfell, crying out for her parents who witness her death in tears. This leads to the departure of half of Stannis's army and Stannis losing the battle against the Boltons.
  * '''Renly Baratheon''' (seasons 1–2) portrayed by Gethin Anthony. Renly Baratheon, Lord of Storm's End, is the youngest brother of King Robert and Master of Laws in the Small Council. He is popular with the people because he is handsome, jovial, and throws extravagant balls and masquerades. He is not fond of fighting or bloodshed, and would rather make friends than kill enemies. He is secretly the lover of Ser Loras Tyrell, the Knight of the Flowers, who convinces him that those qualities make him better ruling material than either of his older brothers. While Robert lies dying, Renly attempts to convince Ned of this, and that the two of them should kidnap Joffrey and rule the realm themselves. However, Ned refuses, so Renly, Loras, and their followers flee south. Once Joffrey becomes King and has Ned executed, Renly challenges his alleged nephew's claim to the throne. Renly declares himself King of the Seven Kingdoms during Season 2 and wins the support of the Baratheon bannermen and the support of other houses, despite Stannis' better claim. He also seals an alliance with the powerful House Tyrell and its bannermen (including Randyll Tarly, father of Samwell Tarly) by marrying Margaery Tyrell. He leads his massive army slowly through southern Westeros, biding his time. Catelyn Stark tries to convince Renly and Stannis to put aside their differences and unite against the Lannisters but it fails as both brothers refuses to give up their claim for the throne. On the night before a battle between his and Stannis' forces, Renly agrees to Catelyn to allow the North and Riverlands be an independent kingdom if they allied with him, but on the condition that Robb Stark swear fealty to him. However, Renly is assassinated by Melisandre, who gives birth to a shadow demon and sends it to kill Renly in order to remove him from Stannis' path. Stannis is initially unaware of the nature of Melisandre's crime, and is later visibly shocked and saddened of the role he played in his brother's death, which he visibly regrets.
  * '''Salladhor Saan''' (seasons 2–4) portrayed by Lucian Msamati. |Lucian Msamati The Prince of the Narrow Sea, Salladhor is a notorious pirate, trader, and smuggler from Lys. An old friend of Davos, he now sails for Stannis Baratheon on his ship, the ''Valyrian'' and his fleet of thirty ships. He has little patience for those that worship R'hollor – Melisandre's God – since he has traveled the world and seen many gods and has come to the conclusion the only true god is between a woman's legs. He agrees to work with Stannis after Davos promises him and his pirates they will be paid in gold and plunder from King's Landing. Salladhor even goes as far as to request the chance to bed Cersei Lannister after the battle, but Davos refuses, unsure if Cersei will be alive at the time. After the Battle of the Blackwater, he finds Davos stranded on a rock and rescues him, but considers his allegiance broken and departs from Stannis' cause after dropping Davos off at Dragonstone, warning him that the Red Woman will pose a threat to him. In season 4, Davos tracks him in Braavos, and offers him gold in exchange for his help in gathering a new army to help them aid the Night's Watch.
  * '''Matthos Seaworth''' (season 2) portrayed by Kerr Logan. Davos' son and second-in-command on his father's ship, ''Black Betha''. Matthos is a devout follower of the Lord of Light and continually tries to convince his father to convert. During the Battle of Blackwater, the ''Black Betha'' is caught in a wildfire explosion, killing Matthos.
  * '''Maester Cressen''' (season 2) portrayed by Oliver Ford-Davies. Oliver Ford Davies Cressen is the aged Maester of Dragonstone, and skeptical of Melisandre's predictions and the ambitions she has instilled in Lord Stannis to proclaim himself king, claiming "since that boar killed his brother, every lord wants a coronation". He is disgusted when Melisandre sets idols of the Seven gods on fire in the name of her god – R'hollor. He dies in a suicidal attempt to kill Melisandre, offering to share a poisoned cup of wine that didn't affect her, but killed the aged Cressen almost instantly.