Note: Do not rely on this information. It is very old.
Electra
Electra (Laodice in Homer) was the daughter of Agamemnon and Clytemnestra, and sister of Iphigenia and Orestes. After her father's murder, she sent her brother to Strophius, king of Phocis, and urged him against Clytemnestra and her lover -ffigistheus. Orestes and his friend Pylades afterwards took vengeance for the death of Agamemnon. The story has formed a theme for AEschylus, Sophocles, and Euripides, and for modern dramas and operas.