| Role | Voice Part | Classification |
|---|---|---|
| Antonina | Soprano | L |
| Irene | Soprano | L |
| Alamiro | Tenor | L |
| Belisario | Baritone | L |
| Giustiniano | Bass | F |
| Eudora | Mezzo Soprano | S |
| Eutropio | Tenor | S |
| Eusebio | Tenor | CB |
| Ottario | Tenor | CB |
| A Centurion | Baritone | CB |
| Minimum Chorus: 32 | ||
| Divisi: SATB |