Nicknames

Many Titans, gods, and demigods have nicknames. Here are them:

Titans

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

Gods

 * Corpse Breath - Hades*
 * Seaweed Brain - Poseidon*
 * The Messenger - Hermes
 * The Dove - Aphrodite
 * Old Drunk - Dionysus*

Demigods and Creatures

 * Seaweed Brain - Percy Jackson
 * Wise Girl - Annabeth Chase
 * Goat Boy - Grover Underwood
 * Not it's actual nickname, just called by someone. For instance, Ares called Hades, "Corpse Breath", called Poseidon, "Seaweed Brain", and called Dionysus, "Old Drunk." Another example is that Percy thinks of Prometheus as an "Slimy Worm."