(in order of appearance)
| The Tutor: | the old family retainer who took young Orestes away for his safety after the murder of Agamemnon |
| Orestes: | youngest child of Klytemnestra and Agamemnon, raised away from home |
| Pylades: | son of Strophios and best friend of Orestes |
| Elektra: | unhappy daughter of Klytemnestra and Agamemnon, who is impatient for her brother Orestes to come home and exact revenge |
| Chorus of Argive Women: | local ladies who take Elektra’s troubles to heart and try to make her feel better |
| Chrysothemis: | not-as-unhappy sister of Orestes and Elektra |
| Klytemnestra: | queen of Argos, widow and murderer of Agamemnon, wife of Aegisthus, and quite a mother to have |
| Aegisthus: | cousin and co-murderer of Agamemnon and new husband of Klytemnestra |