Agamemnon is the king of Mycenae and the commander of the Greek expedition against Troy. He is burdened by power and torn between his ambition for military glory and his love for his family. Following a prophecy, he lures his daughter to the camp under false pretenses to appease the goddess Artemis, placing the demands of the army above his domestic life.

Clytemnestra is the wife of Agamemnon and mother of Iphigenia and Orestes. Initially arriving as a dutiful wife preparing her daughter for marriage, she transforms when she learns the true reason for her daughter's presence at Aulis. She prioritizes her role as a mother over her loyalty to her husband, fighting fiercely to protect her child.

The eldest daughter of Agamemnon and Clytemnestra. She is a gentle, dutiful girl who arrives at the camp under the belief that she is to marry the great hero Achilles. When faced with the grim reality of the prophecy, she is forced to weigh her desire to live against the pressing demands of the Greek army.

A prominent Greek hero and the leader of the Myrmidons. He is proud, deeply concerned with his personal honor, and angered when he discovers his name was used as bait without his permission. He vows to protect Iphigenia, balancing his duty to his commanders with his strict commitment to his own reputation.

An enslaved servant who was originally given to Agamemnon as part of Clytemnestra's dowry. He takes great pride in his loyalty to the royal house, but holds a stronger foundational allegiance to his original mistress, prompting him to intervene when he discovers the brutal plan.

Agamemnon's brother and the husband of Helen. He is the catalyst for the Trojan War, having mustered the Greek army to retrieve his wife from Troy. He is initially rigid in demanding the sacrifice for the sake of the military expedition, but eventually shows an ability to pity his brother's immense grief.

A group of young married women from the Euboean city of Chalcis. They cross the strait to Aulis out of curiosity to see the great army mustering for war. They provide commentary on the events, sympathizing with Iphigenia's plight while simultaneously expressing awe at the heroes and eagerness for the upcoming war against Troy.

The infant son of Agamemnon and Clytemnestra. He does not speak, but his presence serves as a powerful emotional appeal when Iphigenia begs for her life, representing the innocent family bonds threatened by the looming war.

The wife of Menelaus and sister to Clytemnestra. Though she does not appear onstage, her decision to abandon her husband and run off with the Trojan prince Paris triggers the gathering of the Greek army and the subsequent demand for sacrifice at Aulis.

A handsome prince from Troy who visits Menelaus and leaves with his wife, Helen. He is the target of the Greek army's anger and the reason they are preparing to sail across the Aegean to sack Troy.

The prophet for the Greek army. He reveals that Artemis demands a sacrifice in exchange for the wind needed to sail to Troy, placing the military commanders in an impossible position.

A bearer of news within the Greek camp. He brings crucial updates to the main characters, including the initial arrival of the royal family and later details concerning the ritual preparations.