Helen is the queen of Sparta, falsely accused by the Greek world of instigating the Trojan War. In reality, she has spent the last 17 years in Egypt while a phantom copy took her place in Troy. With her protector King Proteus dead, she faces forced marriage to his son, creating immense danger when her actual husband finally arrives in Egypt.

Menelaos is the king of Sparta and conqueror of Troy who washes ashore in Egypt as a bedraggled castaway. He arrives traumatized by years of war, believing he has already recaptured his wife. He struggles to comprehend the bizarre truth of the last decade and relies heavily on his wife's practical intelligence to plan their survival.

Theoklymenos is the reigning King of Egypt who ascends the throne following the death of his father, King Proteus. He is a passionate ruler with a deep prejudice against Greeks. He intends to force Helen into marriage, making him a severe threat to any foreigner who approaches his palace.

Theonöe is an Egyptian princess and royal prophetess who possesses practically omniscient knowledge. She serves as an oracle within the royal courts and maintains a lifelong vow of virginity. She holds the power to reveal Menelaos's arrival to the king, placing his life entirely in her hands.

The Chorus consists of captive Greek women living in exile in Egypt. They serve as natural allies to Helen, sharing in her grief and offering grounded advice. The Leader acts as a prominent individual voice among them, demonstrating moral clarity when facing royal anger.

Teucer is a castaway Greek veteran of the Trojan War who wanders into Egypt. He serves as a bearer of tragic news, updating Helen on the devastating aftermath of the war and the presumed fates of her family members in Greece.

The portress is an old woman who manages access to the royal palace doors. Following Theoklymenos's orders to turn away all Greeks, she treats Menelaos roughly but accidentally reveals crucial information about Helen's presence in Egypt.

The Phantom Helen is a living likeness conjured out of air by the goddess Hera. This convincing fake is the entity that actually traveled to Troy with Paris, causing the infamous war and ruining the true queen's reputation across the Mediterranean.

One of the few survivors of Menelaos's shipwreck, this servant guards the coastal cave where the Spartan king leaves his presumed wife. He brings crucial information to the palace doors regarding bizarre supernatural occurrences.

The messenger is one of Theoklymenos's Egyptian sailors. He works for the king and observes the events that unfold when Greek castaways are granted access to royal ships.

King Proteus is the late ruler of Egypt who originally offered sanctuary to Helen. Though deceased before the events of the play, his physical tomb remains on stage as a sanctuary, and his honorable memory casts a long shadow over the moral decisions of his children.

Kastor is a Greek demigod and one of Helen's brothers. Presumed dead or deified after the devastation of the war, his unknown fate serves as a source of ongoing grief for his sister as she waits in Egypt.

Polydeukes is Helen's other demigod brother. He shares the mysterious fate of his twin, bringing grief to his sister as she waits in Egypt for news of her family's survival.