Season 2 Margaery, newly married to Renly, reveals that she is aware of his romantic relationship with her brother and is willing to work around his desires to secure their alliance and her position. Following Renly's assassination, Margaery indicates to
Petyr Baelish that she is aware that her brother-in-law,
Stannis Baratheon, is more likely to be behind the assassination than
Brienne of Tarth, the official suspect. She also makes it clear that her ambition is to be the Queen of
Westeros, and that she will not settle for anything less.
Season 3 Margaery has relocated to King's Landing and taken up residence in the Red Keep. She swiftly proves that she is one of the few people capable of managing Joffrey, which pleases his grandfather,
Tywin Lannister, but makes her an enemy in Cersei. The series also expands on Margaery's friendship with
Sansa Stark, though her motives are unclear and Margaery swiftly replaces Sansa as Joffrey's fiancée. Through several shrewd PR moves towards the city's poor and orphaned, Margaery becomes extremely popular with the common people as their future Queen.
Season 4 Margaery Tyrell marries Joffrey Baratheon, but is widowed hours later when he is poisoned at the wedding feast. Soon after, Olenna reveals herself as masterminding the poisoning, but Margaery, now aware that
Tyrion Lannister's trial is a farce, keeps quiet. Arrangements are made to wed Margaery to Joffrey's younger brother Tommen, to whom Margaery swiftly ingratiates herself. Cersei and Margaery continue their bitter rivalry; Cersei resents being displaced as Queen and being forced to marry her very young child to the much older Margaery, while Margaery tries to outmaneuver her.
Season 5 Margaery and Tommen marry, and she finally becomes the Queen of the Seven Kingdoms. She taunts Cersei over her triumph, and exhorts Tommen to send Cersei away from the capital. Cersei, in a shortsighted attempt to get rid of her rival, consents for the Faith of the Seven to once again bear arms. Cersei intends for the zealously fervent religious order to seize and condemn Loras for his homosexual behavior, thus tricking Margaery into perjuring herself by denying knowledge of his proclivities. Margaery finds herself arrested and awaiting trial, although Cersei is arrested as well for her unrelated charges, i.e. her incestuous behaviors.
Season 6 After a period of captivity, Margaery is permitted to visit Loras in his cell. She discovers that he is beginning to break under the Faith's questioning and that the meeting is a ploy to break her too. Jaime Lannister leads the Tyrell army on the Sept of Baelor to secure Margaery's release, but it is revealed that she has been absolved, by convincing Tommen to forge an alliance between the Faith and the crown. To placate Cersei, Margaery surreptitiously convinces Olenna to return to Highgarden, subtly indicating that she is still loyal to House Tyrell. She later persuades the High Sparrow, the leader of the Faith, to release Loras, if he surrenders his claim as heir of House Tyrell and joins the Faith. However, when Cersei fails to arrive for her trial Margaery deduces Cersei is plotting something. Panicking, she desperately tries to convince the High Sparrow to evacuate the Sept of Baelor, but the High Sparrow refuses and has the Faith Militant bar the exits. Moments later, wildfire set beneath the Sept by Qyburn on Cersei's orders is ignited, causing the entire Sept and its surroundings to be engulfed in flames. Margaery is killed instantly, along with hundreds of others who were present. Margaery's death and those of her brother and father lead Olenna to accept a proposal by the Sand Snakes (who currently lead the Reach's ancient rival, Dorne) in supporting
Daenerys Targaryen's invasion of Westeros. ==Family tree of House Tyrell==