 | Percy Jackson |
 | Annabeth |
 | Tyson |
 | Clarisse |
Grover | |
 | Luke |
 | Chiron |
 | Mr. D |
Tereus | |
Thalia | |
 | Hermes |
Young Annabeth | |
Young Grover | |
Young Luke | |
Young Thalia | |
 | Gray Sister #2 |
 | Gray Sister #3 |
 | Reardon |
Ichneutae | |
Barista - Hecatonshire | |
 | Kronos |
 | Polyphemus |
 | Ganymede |
 | Cyclops #1 |
Cyclops #2 | |
 | Parcel Store Customer |
 | Polyphemus |
 | Oracle (voice) |
 | Martha |
 | George (voice) |
 | Zeus |
 | Ethan Nakamura |
Lydian Drakon |