| Description | Character | Book First Appeared |
| Son of Poseidon; Riptide is weapon | |
| Daughter Of Athena; Owns Yankees Invisibility Cap | |
| Satyr; Is friends with Percy at boarding school | |
| Son Of Hermes; Traitor To Camp Half-Blood | |
| Daughter Of Ares; Gets Covered in Toliet Water By Percy | |
| Centaur; Director At Camp Half-Blood | |
| Evil Titan God | |
| God Of Wine; Forced To Work At Camp Half Blood | |
| Cyclops; Percy's Half-Brother | |
| God Of Sea; Percy's Father | |
| God Of The Sky; Head God | |
| | Description | Character | Book First Appeared |
| Goddess Of Wisdom; Annabeth's mom | |
| God Of War; Clarisse's Dad | |
| Goddess Of Love | |
| Daughter Of Aphrodite; Dated Beckendorf | |
| Son Of Hephaestus; Dated Silena | |
| God Of The Sun. Medicene, Music, etc | |
| Ruler Of The Underworld | |
| Once A Tree; Lieutenant Of Artemis' Hunters | |
| Son Of Hades; Was Trapped In Lotus Casino & Hotel | |
| Daughter Of Hades; Was Trapped in Lotus Casino | |
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