Eris is the daimon, or goddess depending on the source, of discord, strife, rivalry, and contention; specifically she is associated with the strife of war. Though Eris is also associated with competitive strife, marital strife and ending arguments. Eris is also known as the Lady of Sorrow, waker of onset-shouts, giver of pain, nurse of (tearful) wars, sacker of cities, defender of peoples, and the Battle Queen
She enjoys haunting battlefields and delights in bloodshed, be it among mortals or immortals, she often goads others into fighting and then watches and gloats as they battle. It is said that she wanders battlefields even when the fighting is over and the other gods have withdrawn. Her blood lust is insatiable, her wrath relentless, and she rejoices in the moaning and havoc that she creates. Eris is said to be unloved by men, because she creates evil wars and slaughter, but under her compulsion and by the will of the gods they promote her. Despite this she can also move lazy people to work hard by causing them strife with their more successful and hard working neighbors. Her most noticeable feature is her maddening scream, which is loud and terrible to hear, inspires people to fight and fills them with strength. Even when she isn’t screaming her voice is said to be thunder-like. Eris is said to be aweless, mighty, insensate (unfeeling), ghastly, frightful, impartial, pitiless, and deadly. Rarely does she play favorites in battles, and brings down misery upon both sides equally. Unsurprisingly she gets along well with Ares (god of war), and will even ride along with him in his chariot, though she is avoided by other deities do to her violent ways and ability to cause conflict. In the Illiad it is said that her likeness is depicted on Athena’s aegis (shield) and that she imbedded it with part of her powers. Her image is also said to be depicted on Herakles’ shield in Hesoid’s The Shield of Herakles along with Proioxis (pursuit) Palioxis (flight), Homados (confusion and disorder), Phobos (panic), the Androktasia (slaughter), and Kyodoimos (confusion). Those who saw her image on his shield and attempted to attack him had their minds and senses taken away. Often Eris is identified with the goddess Enyo (war), and the two were sometimes interchanged.
She is said to fight with a lance or a two-edged sword, has viperine (viper like or poisonous) hair, wears a torn mantle and a blood soaked headband, and occasionally is shown with black wings. During battle she physically grows taller as the battle wages until she is as tall as the clouds, and then she brings down bitterness upon both sides and increases pain. it is said that she can make blood rain down, shake the earth with her steps, and breathe fire. She lives in the Underworld and likes to perch on its entrance.
Her lineage changes depending on the author. Homer states she is the daughter of Hera and Zeus, and the sister to Ares, While Hesoid claims she is the daughter of solely Nyx in the Theogony, and Hyginus says it her parents are Nyx and Erebus.
Eris is the mother to many Daimon childern, such as Ponos (hard wark), Lethe (forgetfullness), the Algea (pain and suffering), the Hysminae (female spirits of combat), the Makhae (male spirits of combat), the Phonoi (murder), the Androktasia (battlefield slaughter), the Neikea (fueds), the Pseudologoi (lies), the Amphilogia (disputes), Dysmonia (lawlessness), Ate (delusion), and Horkus (oaths that punish perjurers). She gave birth to all of her children by herself.
Eris’ most famous appearance in Greek Mythology is as the instigator of the Trojan War, which she started out of resentment for not being invited to the wedding of Peleus and Themis. Originally she sides with Ares and the Trojans, but later on she becomes an independent force. During this war she is the only immortal still allowed to wander the field after Zeus declares that the gods are not allowed to interfere with the fighting any longer. During Zeus battle with Typhoeus she escorts Typhoesus into battle, while Nike escorts Zeus, but after the battle begins she keeps balance between the two. Aphrodite calls for her Deimos (fear), Lyssa (rage), Dolos (treachery) and the Keres (violent death) to assist the women of Lemnian in their slaughter of their unfaithful husbands in Valerius Glaccus’ Argonautica . Jason uses a helmet of hers to turn the Spartoi warriors against themselves. She goes to Dionysos in a dream as Rhea (titan of fertility and mother to the first six Olympian gods) and shames him for not going into battle when Deriades, the King of India, had summoned him by telling him that all the other gods and goddess look down and laugh at him, and that no one fears him. During the battle she comes and supports him. Along with Penthos (grief) and Algos (anguish) she helped Hephaestus craft the cursed necklace of Harmonia which sent Thebes into a civil war. On one occasion Hera summons Eris to create strife between the couple Polytechnus and Aedon since they stated that they loved each other more than Zeus and Hera did. Hera also sent her against Herakles. When the women of Lemnos stopped worshipping her she drove them to murder their husbands.