| Lavarcham, Deirdre’s nurse |
| Old Woman, Lavarcham’s servant |
| Owen, Conchubor’s attendant and spy |
| Conchubor, High King of Ulster |
| Fergus, Conchubor’s friend |
| Deirdre |
| Naisi, Deirdre’s lover |
| Ainnle, Naisi’s brother |
| Ardan, Naisi’s brother |
| Two Soldiers |
Scene—Act I, Lavarcham’s house on Slieve Fuadh. Act II, Alban. Early morning in the beginning of winter. Outside the tent of Deirdre and Naisi. Act III, Tent below Emain Macha