Electra is the daughter of the murdered King Agamemnon and Queen Clytemnestra. To neutralize her as a political threat, the new rulers force her into a marriage with a humble farmer, stripping her of royal privileges. She performs grueling domestic chores and harbors intense resentment toward her mother while awaiting the return of her brother to exact vengeance.

Orestes is the exiled son of Agamemnon and Clytemnestra. He returns to the Argive countryside in disguise, seeking to fulfill an oracle of Apollo by avenging his father's death. Though he boasts of his high birth and education, he relies heavily on his sister and local allies to execute his covert mission.

Clytemnestra is the queen of Argos who murdered her former husband Agamemnon. She rules the city alongside her lover Aegisthus while keeping her surviving children marginalized or exiled. Despite her ruthless past actions, she harbors feelings of guilt and expresses unexpected maternal concern.

Aegisthus is Clytemnestra's lover and the current ruler of Argos. He orchestrated the plot to marry Electra to a lowly farmer to remove her from the royal bloodline. He lives in wealth and paranoia, constantly guarding against the potential return of the rightful heir.

The Farmer is a poor but highly honorable man living in the Argive countryside. The usurping rulers give him the royal Electra in marriage to ensure her children will have no claim to the throne. Recognizing the political nature of this arrangement, he treats his wife with deep respect and refuses to consummate the union.

The Old Man is an elderly, formerly enslaved servant of King Agamemnon. Years ago, he saved the young Orestes from execution by smuggling him out of Argos. He remains fiercely loyal to Agamemnon's surviving children and openly despises the current rulers of the city.

The Chorus consists of a group of young women from the Argive countryside. They visit the Farmer's home to offer Electra companionship. They provide a sympathetic audience for Electra's grievances and comment on the unfolding events.

Pylades is the silent companion and closest ally of Orestes. He travels alongside the exiled prince back to Argos, standing faithfully by his side as they survey the dangerous political environment of their homeland.

The Dioscuri are Castor and Polydeuces, the divine twin brothers of Clytemnestra who have been elevated to godhood. They observe the mortal realm from above, representing divine destiny and the ultimate judgment of human actions.

Agamemnon is the former King of Argos and commander of the Greek forces at Troy. Though deceased before the events of the play, his murder at the hands of his wife Clytemnestra drives the entire plot. His memory motivates his surviving children to seek retribution.