The Erinys

Also known as The Furies, these ladies were not to be messed with! Even Zeus himself could do nothing to stop them from punishing the wicked. They avenged crime, driving their victims mad as they pursued them. Among those they tortured were Orestes, Oedipus, Meleager, and Agamemnon.

Alecto--"The Relentless"
Megaera--"The Grudge-Bearer"
Tisphone--"The Blood Avenger"