| Role | Voice Part | Classification |
|---|---|---|
| Zelmira | Soprano | L |
| Antenore | Tenor | L |
| Polidoro | Bass | L |
| Ilo | Tenor | L |
| Leucippo | Bass-Baritone | L |
| Emma | Mezzo Soprano | F |
| Corista | Mezzo Soprano | S |
| Gran Sacerdote | Bass | B (8 measures - cannot be taken from chorus) |
| Minimum Chorus: 24 | ||
| Divisi: SATB |