Who avenged her daughter’s death by killing Aegisthus?

Clytemnestra avenged her daughter Iphigenia's death by killing Aegisthus, who was involved in the events surrounding Agamemnon's return from the Trojan War and his own death. In Greek mythology, Agamemnon sacrificed Iphigenia to appease the goddess Artemis for favorable winds to sail to Troy. Clytemnestra's desire for revenge stems from this heinous act, leading her to orchestrate Agamemnon's murder upon his return home.

Clytemnestra's actions are significant as they reflect themes of revenge, justice, and the impact of familial tragedy within the mythological narrative, particularly in connection to the cycle of vengeance seen in the House of Atreus. This makes her a pivotal character in Greek mythology, embodying the complexities of maternal grief and retribution.

Other figures listed, such as Electra, Penelope, and Andromache, have their own stories and narratives but do not fit this particular act of avenging Iphigenia's death against Aegisthus. Electra is involved in the aftermath of Agamemnon's murder and she seeks vengeance alongside Clytemnestra, but she is not the one who directly kills