Santorini: Soaring over Olympus contains 17 characters:
Aeolus
Aloadae
Boreas
Daedalus
Eirene
Europa & Talus
Gryphus
Harpies
Helios
Heracles
Hermes
Hesperides
Nike
Pleiades
Polyhymnia
Selene
Stymphalians
It also contains 2 mode cards:
Harmonia's Test
Chimera's Flight