Percy Jackson: Seaweed Brain, Boss, Captain Salt Water, Kelp Head, Peter Johnson, Prissy, Water Boy, Aquaman

Annabeth Chase: Wise Girl, Annie Bell, Owl Head

Grover Underwood: G-man, Goat Boy

Rachel Elizabeth Dare: Dare, Mortal Girl, Redheaded Nightmare, Oracle of Delphi

Thalia Grace: Pinecone Face

Jason Grace: Sparky, Blonde Peter Pan, Blonde Superman, John Green, Lightning Boy, Lightning Man, Sparkhead

Piper McLean: Beauty Queen, Dumpster Queen, Pipes

Leo Valdez: Uncle Leo, Admiral, Mr. Spock, Repair Boy, Supreme Commander of the Argo II

Hazel Levesque: Miss Metal Detector

Frank Zhang: Fai, Chinese Canadian Baby Man

Nico di Angelo: Death Breath, Death Boy, Ghost King, Zombie Dude

Charles Beckondorf: Beckendorf

Chiron: Captain Sunshine, Mr. Brunner


Dionysus: Mr. D, Wine Dude

Poseidon: Barnacle Beard, Old Seaweed

Athena: Gray Eyed One, The Wise One

Hera: Her Most Annoying Majesty, The Loose Cannon, Queen of the Heavens

Hades: Corpse Breath, The Silent One, The Rich One

Hephaestus: Fur Face

Calypso: Sunshine


Paul Blofis: Mr. Blowfish

Gabe Ugliano: Smelly Gabe