Enyo (Greek: Ἐνυώ, English translation: "warlike") in Greek mythology, was an ancient goddess of war, acting as a counterpart and companion to the war god Ares. She is also identified as his sister, and daughter of Zeus and Hera, in a role closely resembling that of Eris; with Homer (in particular) representing the two as the same goddess. She is also accredited as the mother of Enyalius, a minor war god, by Ares. However, the name Enyalius can also be used as a title for Ares himself.
As goddess of war, Enyo is responsible for orchestrating the destruction of cities, often accompanying Ares into battle, and depicted "as supreme in war" . During the fall of Troy, Enyo inflicted horror and bloodshead in the war, along with Eris, and Phobos ("Fear") and Deimos ("Dread"), the two sons of Ares. She was also connected to the Roman goddess of war, Bellona, and the Anatolian goddess Ma.
At Thebes and Orchomenos, a festival called Homolôïa was celebrated in honour of Zeus, Demeter, Athena and Enyo, and Zeus was said to have received the surname of Homoloïus from Homoloïs, a priestess of Enyo. A statue of Enyo, made by the sons of Praxiteles, stood in the temple of Ares at Athens. Among the Graeae in Hesiod there is one called Enyo.