| A | B |
| Achilles | Greek hero; leader of the fierce Myrmidon warriors; son of Thetis and Peleus; Iphigenia's supposed husband |
| Agamemnon | King of Argos; Commander-in-chief of the Greek forces; brother of Menelaus |
| Calchas | Prophet who advises Agamemnon that he must sacrifice his daughter to appease Artemis |
| Chorus of Women | Women who gather to watch the glorious Greek troops |
| Clytemnestra | Helen's half-sister and Agamemnon's wife. Mother of Iphigenia. |
| Helen | Clytemnestra's half-sister. Daughter of Zeus. Menelaus' wife seduced by Paris |
| Hermione | Helen and Menelaus' daughter |
| Iphigenia | Clytemnestra and Agamemnon's daughter |
| Menelaus | King of Sparta; husband of Helen |
| Odysseus | Clever Greek; son of Sisyphus; one of four people who know of the demand to sacrifice Iphigenia |
| Old Servant | Asked to deliver Agamemnon's letter to Clytemnestra; originally worked for Clytemnestra's family; stands up to Menelaus |
| Orestes | Agamemnon and Clytemnestra's infant son; brother of Iphigenia |