Kassandra is the protagonist players can choose in Assassin's Creed Odyssey alongside Alexios.
Odyssey lets players select Kassandra or Alexios at the beginning of the game. The chosen character becomes the playable Spartan mercenary whose journey unfolds during the Peloponnesian War in fifth-century BCE Greece.
The game's branching dialogue, relationships, and quest outcomes allow players to shape parts of the adventure, but both choices use the same broad historical setting and central family conflict. Kassandra is the protagonist used in the novelization and is treated as the canonical Eagle Bearer in related lore.
Kassandra should not be confused with Myrrine, her mother, Aspasia, an important Athenian figure, or Phoibe, a young character who assists her. Those characters are part of the story but are not the selectable player character.