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, The Son of Neptune, The Mark of Athena

Eudora

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

Annabeth Chase

Percy's girlfriend, a daughter of Athena, who joins the hunt for the chalice and supplies the planning and quick thinking.

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 Lost Hero, The Mark of Athena, House of Hades, The Blood of Olympus

Grover Underwood

Percy's loyal satyr best friend, whose music and nature magic help the group get past dangers on the quest.

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, Percy Jackson and the Singer of Apollo, The Blood of Olympus, The Burning Maze, The Titan's Curse: The Graphic Novel

Ganymede

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

Hebe

The goddess of youth, who runs an arcade in Times Square and is one of the first suspects in the chalice's disappearance.

Iris

The goddess of the rainbow, who trades a lead on the chalice for a favor: cleansing her herald's staff in a polluted river.

Poseidon

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

Also in The Lightning Thief, The Titan's Curse

Zeus

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

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