Electra is the princess of Mycenae who refuses to cease publicly mourning the murder of her father, King Agamemnon. She operates with a strict moral compass and actively rejects attempts by her family to force her into submission. Her continuous lamentation traps her in a cycle of grief, while her defiance positions her as a constant inconvenience to the current rulers of the palace.

Orestes is the prince of Mycenae who was smuggled out of the kingdom as an infant by his sister Electra to protect him from their mother. Now grown, he returns to his homeland under the guidance of an oracle to avenge his father's death. He acts strategically, using fabricated stories and disguises to manipulate his enemies' perceptions and gain access to the royal house.

Clytemnestra is the queen of Mycenae who rules alongside her new husband after murdering King Agamemnon. She justifies her violent actions as a mother's vengeance for the sacrifice of her eldest daughter, Iphigenia. She views her surviving children as her property and deeply resents Electra's constant public mourning.

Aegisthus is the current king of Mycenae who rules the kingdom after replacing Agamemnon in both power and marriage. He wields Agamemnon's former scepter and maintains control over the household through intimidation. He plans to imprison his stepdaughter in an underground cell to silence her continuous protests against his rule.

Paedagogus is an old servant and former tutor who was entrusted with an infant Orestes after Agamemnon's murder. He serves as a pragmatic strategist for the prince, constantly pushing him to take decisive action rather than getting caught up in lengthy speeches. He participates directly in the deception required to infiltrate the palace by assuming a false identity.

Chrysothemis is the sister of Electra and Orestes who chooses to assimilate into the new household dynamic for her own survival. She serves as a pragmatic foil to Electra's righteous anger, advising her sister to lower her sails and submit to the new rulers. Despite her caution, she quietly sympathizes with her sister's desire for justice.

The Chorus consists of a group of local Mycenaean women who observe and comment on the royal family's conflicts. They act as confidants to Electra, attempting to console her and cautioning her against reckless behavior. They provide moral commentary on the unfolding events while maintaining a sympathetic stance toward the grieving princess.

Pylades is Orestes's cousin and trusted companion. He travels silently alongside the prince, providing physical and moral support as Orestes enacts his plan to infiltrate the palace of Mycenae.