Demigod son of Poseidon, wields water powers and sword Riptide to protect Camp Half-Blood.
Luke is the primary antagonist who betrays the camp and seeks to destroy Olympus.
Clarisse initially mocks Percy but later becomes a temporary ally in battle.
Grover is Percy's most trusted companion and satyr protector.
Annabeth serves as a strategic partner and close friend to Percy throughout the journey.
Percy discovers and accepts his cyclops half-brother during the quest.
Explore the full interactive character relationship map of Percy Jackson: Sea of Monsters