Kassandra is the protagonist of the novel adaptation of Assassin's Creed Odyssey.
The video game allows players to choose either Kassandra or Alexios as the playable misthios. The official novelization, written by Gordon Doherty, uses Kassandra as its protagonist, making her the canonical viewpoint for that adaptation.
Odyssey follows Kassandra in the fifth century BCE as she travels across the Greek world during the Peloponnesian War. The story combines family drama, political conflict, myth-inspired encounters, and the continuing struggle between opposing secret organizations.
A common source of confusion is the game's choice of protagonist. Alexios is not simply an alternate name for Kassandra: in the game, the selected sibling becomes the playable character, while the other takes the role of Deimos. The novel removes that player choice by consistently telling the story through Kassandra.