Nicknames

The gods, Titans and demigods all have names throughout the books:

Titans

 * The Piercer - Iapetus
 * The Crooked One - Kronos
 * The Ram - Krios
 * The Watcher - Hyperion
 * Slimy Worm - Prometheus
 * Sky Bearer, The General - Atlas

Gods

 * Corpse Breath - Hades
 * Old Seaweed, Barnacle Beard - Poseidon
 * The Messenger - Hermes
 * The Dove - Aphrodite
 * Old Drunk, Wine Dude, Mr. D - Dionysus
 * Twin Archers - Apollo & Artemis
 * The Hot - Apollo
 * The Wise One - Athena
 * Fur Face, The Forge - Hephaestus

Giants

 * Golden Boy - Alcyoneus
 * Enchiladas - Enceladus
 * Porpoise Fear - Porphyrion

Demigods

 * Seaweed Brain, Boss, Kelp Head, Peter Johnson, Perry Johanson, Pedro, Prissy - Percy Jackson
 * Wise Girl, Owl Head, Annie Bell - Annabeth Chase
 * Pinecone Face - Thalia Grace
 * Sparky, Lightning man, Superman, John Green - Jason Grace
 * Beauty Queen, Pipes - Piper McLean
 * Fai, Klutz (Given to him by himself) - Frank Zhang
 * Dead Boy, Zombie Dude, Death Boy, Ghost King - Nico di Angelo
 * Repair boy, Supreme commander of the Argo II (self-proclaimed) - Leo Valdez
 * Charlie, Beckendorf - Charles Beckendorf

Creatures

 * Goat Boy, G-man - Grover Underwood
 * Big Guy - Tyson
 * General Eisenhower, Goat Man - Gleeson Hedge
 * Skippy - Scipio