No, in the BBC series Merlin, Arthur does not know Morgana is his half-sister for most of the show; he discovers the truth at the end of Season 3 when Uther reveals it, causing Arthur immense shock and devastation as he realizes their shared parentage and her hidden magical heritage. Before this, they developed feelings for each other, unaware they were siblings, and Uther kept Morgana's true parentage (his own daughter) a secret, raising her as his ward after her mother's death.
Unbeknownst to anyone in the room, Arthur and Merlin are also present, witnessing the event through a grate in the wall. Arthur is visibly devastated not only by Morgana's betrayal but by his father's concealment of her being his sister.
He finds out at the end of season 3 in the episode “The Coming of Arthur: Part One”. Morgana takes over Camelot and confronts Uther and mentions that she knows he's her father. Arthur and Merlin are hiding nearby and Arthur hears her.
She wants to learn magic from Merlin, but he refuses her. She seduces Arthur in the hope that she can later use it against him.
Mordred is the only son of King Arthur. In most versions of the legend, Mordred's mother is Arthur's half-sister, making him a product of incest.
In addition, while Arthur is more conflicted than Uther, he does condone Uther's actions, and keeps up the same regime when he takes the throne. Lastly, Morgana feels betrayed by Arthur. Maybe she thought that Arthur ordered Merlin to poison her, or maybe it's just his overall stance towards magic in general.
Merlin loves Arthur due to their intertwined destiny, where Merlin's magic exists to protect Arthur and guide him to become the great king he's fated to be, fostering a deep bond of friendship, loyalty, and profound care that evolves from obligation to genuine love, with some interpretations suggesting romantic love as well, especially given their willingness to sacrifice everything for each other.
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Growing up in the household of Gorlois, Morgana and Gorlois are led to believe that they are father and daughter. When she is ten years old, Gorlois dies in battle and Morgana goes to live with her biological father, Uther Pendragon and grows up like siblings with Arthur Pendragon.
But let's set the record straight: Morgana was never Uther's child. She was his ward, taken under his care after the death of her father, Gorlois, the Duke of Cornwall. In Season 1, Episode 12, Morgana confronts Uther with chilling clarity. She tells him face to face that he sent her father to his death.
She ultimately redeems herself by stripping her fallen undead half-brother of Excalibur and sacrifices herself to put an end to his reign of destruction once and for all, saving Jim from his corruption and protecting the Guardians from his evil.
Initially a kind and empathetic young woman, Morgana comes to despise Uther for his prejudice against magic and when she realizes he would never accept her if he knew of her magical powers, she begins covertly plotting against him. She becomes the show's primary villain by the third series, coveting Arthur's throne.
In the 1995 novelette Namer of Beasts, Maker of Souls, by Jessica Amanda Salmonson, Merlin has a twin-sister called Ganicenda, described as "Divine Wisdom, with her head in heaven and her feet in Sheol".
Merlin reveals his magic to an enraged Uther, who then attempts to kill the young warlock. He is prevented from doing so by Arthur. Though Arthur admits to loving and respecting his father, he says that Uther had his chance to rule but now it's his son's turn to be king.
Balinor lived as a hermit for nineteen years, until he was visited by Arthur Pendragon and his long-lost son, Merlin, who informed him of their shared blood. Merlin and Arthur begged for help as the Great Dragon was destroying Camelot, and Balinor, being the last of his kind, was the only one who could help.
Then, revealing himself, Merlin prophesies that whereas Arthur will die a worshipful death, Merlin's death will be shameful — he will be sealed in the earth alive. A few days later a squire comes to the court with his dying master, wounded by Sir Pellanor.
In the Tavola Ritonda, Camelot is abandoned and falls to ruin after the death of Arthur.
Lancelot sacrificed himself in Arthur's place to banish the Dorocha, leaving Arthur deeply saddened. He held a memorial for Lancelot and made a speech naming him as the noblest knight he'd ever known (The Darkest Hour).
However, after discovering of Meliodas's betrayal, Arthur accepted the fact that Meliodas was the enemy. He stated that he would never forgive Meliodas for what he had done, and then tries to kill Meliodas.
Season 1 shows Arthur coming of age, which is presumably 21. So he's 31 when he dies? ps The legends vary ofc, some have Arthur die at 30 after a three-year reign and some have him die at 45 after a 25 year reign.
Merlin never betrayed Arthur.
Lancelot is named after Lancelot of the Lake, one of the Knights of the Round Table in Arthurian mythology where he typically figures as King Arthur's greatest companion and one of his greatest knights, and his parents were King Ban of Benoic and Queen Elaine.
Arthuretta as a girl's name is of Celtic origin. Feminine form of Arthur.
Sir Lancelot was King Arthur's most trusted companion and loyal friend, but the closeness of their relationship made Lancelot's ultimate betrayal all the more painful.