In As You Like It, there is obvious sibling rivalry and antagonism between Orlando and Oliver, and also between Duke Frederick and Duke Senior. Most adaptations of Sherlock Holmes depict sibling rivalry with his brother, Mycroft Holmes. In John Steinbecks East of Eden, the brothers Cal and Aron Trask are counterparts to Cain and Abel of the Bible story. A Song of Ice and Fire contains numerous examples, such as that between Stannis Baratheon and Renly Baratheon. After their eldest brother Robert Baratheons death they contend for the Iron Throne, Stannis finally killing Renly through dark magic on the night before Renly intends to kill Stannis in battle, though it is left unclear whether he is aware of his role in Renlys death. The history of Westeros also contains "The Dance of the Dragons", in which Princess Rhaenyra Targaryen and her half-brother Aegon II Targaryen fought over the Iron Throne after their Father Viserys I Targaryens death, Aegon eventually killing Rhaenyra, but being poisoned shortly after, leading to Rhaenyras son Aegon III becoming king. In film and television
Sibling rivalry is a common theme in media that features child characters, reflecting the importance of this issue in early life. These issues can include jealousy on the birth of a new baby, different sibling roles, frequent arguments, competitiveness for mothers affection, and tensions between step-siblings. Adult siblings can also be portrayed with a rivalrous relationship, often a continuation of childhood conflicts. Situation comedies exploit this to comic effect. Sibling relationships may be shown as alternately loving and argumentative.
ATU 403, "The Black and the White Bride": a woman, dispised by her (step)family, marries a prince. Later, her step-mother conspires to replace the woman with her (step)sibling. ATU 432, "The Bird Lover" or "The Prince as Bird": a maiden is visited at night by a bird, which is a prince in disguise. Her family  begin to suspect something and set up a trap by her window: they put spikes (nails, broken glass, thorns) to hurt the bird. The bird prince thinks her beloved betrayed him and flees, which prompts the heroine to seek him in parts unknown. ATU 480, "The Kind and Unkind Girls" or "The Spinning-Woman by the Spring": two sisters or stepsisters, one diligent and the other lazy, meet a supernatural entity in the woods or in a magical realm. The diligent sibling acts kindly and obeys the entitys orders, and is rewarded; the lazy one disobeys and is punished. ATU 510A, "Cinderella": the heroine is maltreated by her stepmother and stepsiblings. ATU 511, "One-Eye, Two-Eyes, and Three-Eyes": two women (the first one-eyed and the other three-eyed) mistreat their sibling, a woman with two eyes. ATU 530, "The Princess on the Glass Hill": a father sends his three sons to guard his crops or to hold a vigil on his grave. The older ones disobey and/or feel frightened, so they send their youngest brother, whom they call a fool or stupid, to fulfill their fathers orders.