Irrational Fears

Irrational fears are one sign of Demigods. Most Demigods suffer from fears their parents had.

Known Fears

 * Children of Athena fear spiders due to Arachne (see Arachnophobia)
 * Children of Hephaestus fear heights due to their father being pitched off Mt. Olympus by Hera.
 * It is possible Children of Ares are claustrophobic due to Ares being stuffed into a jar for an enitre war at one point.
 * Satyrs are scared of underground

Unique Fears

 * Percy Jackson is claustrophobic (shown in The Lightning Thief)
 * Thalia Grace is afraid of heights (shown in The Titan's Curse)
 * Grover Underwood fears Cyclopes [especially Tyson (shown in The Battle of the Labyrinth)]