Kassandra is the canonical protagonist of Assassin’s Creed Odyssey’s tie-in novel.
Odyssey lets players choose between two siblings, Kassandra and Alexios, as the playable character. The official novelization by Gordon Doherty uses Kassandra as the protagonist, establishing her as the canonical Eagle Bearer for the novel’s version of the story.
The game itself accommodates either choice and presents Alexios as the alternative playable character. That design means answers based only on a player’s personal campaign can differ, but the tie-in novel provides a specific canonical selection. Odyssey is set in ancient Greece during the Peloponnesian War and follows the protagonist’s search for family, identity, and the fate of the Cult of Kosmos.