Christopher Nolan's cinematic adaptation of Homer's "The Odyssey" introduces a pivotal character not found in the ancient epic: Sinon, portrayed by Elliot Page. This addition, drawn from Virgil's later poem "The Aeneid," serves to underscore the personal tragedies and moral complexities inherent in Odysseus's fabled journey.

Sinon first appears in the film's opening, recalling the tale of the Trojan Horse. He is depicted as one of the warriors who, unaware of the soldiers hidden within, helps deceive the Trojans into accepting the horse as a gift from Athena. This act leads to Troy's downfall and Sinon's own death, shot by Trojan defenders as he approaches the horse. While Sinon plays a more active, manipulative role in "The Aeneid," Nolan's interpretation presents him as a more sympathetic figure, a pawn caught in the larger conflict.

In Nolan's "The Odyssey," Sinon is the son of a servant who worked for Antinous, the film's primary antagonist. Flashbacks reveal a childhood connection between Sinon and Antinous, with Sinon ultimately taking Antinous's place in the Trojan War out of fear. This backstory adds a layer of personal betrayal and sacrifice to Sinon's fate.

During a surreal sequence where Odysseus ventures into the underworld, Sinon's spirit reveals the full extent of Odysseus's manipulation. He explains that Odysseus exploited his innocence, using him to sell the Trojan Horse deception without revealing the Greek warriors concealed inside. Sinon also recounts the poverty his father endured in Ithaca, a consequence of Antinous failing to uphold his promise to care for his family. This revelation frames Sinon as a victim of both Odysseus's strategic ruthlessness and Antinous's perfidy.

Nolan uses Sinon to represent the human cost of war and Odysseus's actions. He is presented as one of the few innocent characters ensnared in the conflict, a tangible representation of the tragedy Odysseus leaves in his wake. The character also serves to deepen the animosity between Odysseus and Antinous. While the audience witnesses Antinous's schemes, Odysseus only knows Antinous as the man responsible for an innocent's death.

Upon his return to Ithaca, Odysseus invokes Sinon's name to taunt Antinous, ultimately bringing up Sinon one last time as Antinous meets his end. Despite his limited screen time, Sinon's presence, amplified by Page's performance, reframes "The Odyssey." He serves as a focal point for Odysseus's flaws, illustrating his capacity to sacrifice individuals for a greater objective, while also highlighting his desire to honor a memory. Nolan's narrative choice emphasizes that even within an expansive epic, the story is ultimately shaped by individual lives and their fates.