Characters in The Chalice of the Gods

Percy Jackson

High-school senior chasing a college recommendation letter from Ganymede.

Also in The Lightning Thief, The Sea of Monsters, Wrath of the Triple Goddess, The Titan's Curse, The Battle of the Labyrinth, Percy Jackson and the Sword of Hades, The Last Olympian, Percy Jackson and the Singer of Apollo, Percy Jackson's Greek Gods, Percy Jackson's Greek Heroes

Eudora

A sea nymph serving as Percy's high-school guidance counselor who steers him toward the quest.

Annabeth Chase

Also in The Lightning Thief, The Sea of Monsters, Wrath of the Triple Goddess, The Titan's Curse, The Battle of the Labyrinth, The Last Olympian, The Demigod Files

Grover Underwood

Also in The Lightning Thief, The Sea of Monsters, Wrath of the Triple Goddess, The Battle of the Labyrinth, The Last Olympian, Percy Jackson and the Singer of Apollo

Ganymede

Zeus's cupbearer whose lost chalice sets off the quest.

Poseidon

Percy's father, the sea god, appearing in a supportive role.

Also in The Lightning Thief

Zeus

King of the gods whose feast and palace frame the quest's deadline and stakes.

Also in The Lightning Thief, Percy Jackson's Greek Gods