Minor Characters
The Oracle
The Oracle is an entity that resides in the top floor of the house at Camp Half-Blood. Though the Oracle is an object rather than a living being, it takes the form of a shriveled mummy in a dress and dispenses cryptic prophecies when it sees fit.
Athena
Athena is a warrior goddess who has a rivalry with Poseidon. There are several of Athena’s children at Camp Half-Blood; Annabeth is one of them. They’re all extremely intelligent, good at puzzles and strategy, and are fierce warriors. Athena never appears directly in the novel.
Uncle Ferdinand
Uncle Ferdinand is one of Grover’s uncles. Uncle Ferdinand was a searcher and, like all searchers, never returned after leaving to look for Pan. Grover discovers a statue of Uncle Ferdinand in Medusa’s sculpture garden.
Gladiola
Gladiola is a pink poodle who ran away from home but who offers himself to Percy, Grover, and Annabeth so they can collect the reward money for returning him. Though Gladiola never speaks to Percy, he can speak to Grover.
Arachne
Arachne is a mortal woman who was a skilled weaver. Arachne had a feud with Athena, and after she hanged herself, Athena turned her into a spider. Now, Arachne’s children take revenge on Athena’s children, all whom—including Annabeth—are afraid of spiders because of this.
Darrin
Darrin is a boy whom Percy meets at the hotel in Las Vegas. They play several arcade games together, but then Darrin reveals that he thinks it’s 1977—he’s been imprisoned in the hotel for decades.
Echidna
Echidna is the Mother of Monsters—specifically, she’s the mother of the Chimera. Echidna has a forked tongue and reptilian features. She and the Chimera attack Percy on the observation deck of the Gateway Arch in St. Louis.
Nancy Bobofit
Nancy is a bully at Yancy Academy who makes a point to pick on Percy more than anyone else. She’s one of Mrs. Dodds’s favorite students.
Eddie
Eddie is the super of Mom’s apartment building. He often plays poker with Smelly Gabe, but he seems sympathetic toward Percy.
Argus
Argus is the security guard at Camp Half-Blood. He has eyes all over his body, which allows him to keep an eye out for danger as he ferries demigods around.
Persephone
Persephone is a goddess, and she’s Hades’s wife. Persephone doesn’t appear in the novel, but Percy takes note of her throne and her pomegranate grove in the Underworld.
Mrs. Kerr
Mrs. Kerr is the math teacher who replaces Mrs. Dodds after Percy slays her.
Nereid
Nereid is a water nymph who brings messages to Percy.