| Role | Voice Part | Classification |
|---|---|---|
| Ariadne | Soprano | L |
| Dionysus | Baritone | L |
| Phaedra | Soprano | F |
| Theseus | Tenor | F |
| Bacchantes: | ||
| Soprano | Soprano | B |
| Mezzo Soprano | Mezzo Soprano | B |
| Contralto | Contralto | B |
| Shipwrecked Sailors: | ||
| Tenor | Tenor | B |
| Baritone | Baritone | B |
| Bass | Bass | B |
| Minimum Chorus: No chorus |