Overview
Electra, also spelt Elektra, is one of the most popular mythological characters in tragedies. She is the main character in two Greek tragedies, Electra by Sophocles and Electra by Euripides. She is also the central figure in plays by Aeschylus, Alfieri, Voltaire, Hofmannsthal, and Eugene O'Neill. She is a vengeful soul in The Libation Bearers, the second play of Aeschylus' Oresteia trilogy. She plans out an attack with her brother to kill their mother, Clytemnestra.
In psychology, the Electra complex is named after her.
Family
Electra's parents were King Agamemnon and Queen Clytemnestra. Her sisters were Iphigeneia and Chrysothemis, and her brother was Orestes. In the Iliad, Homer is understood to be referring to Electra in mentioning "Laodice" as a daughter of Agamemnon.
Murder of Agamemnon
From Wikipedia (CC BY-SA 4.0).