Eris is the Greek goddess of strife and discord. Her name is the equivalent of Latin Discordia, which means "discord". Eris' Greek opposite is Harmonia, whose Latin counterpart is Concordia. Homer equated her with the war-goddess Enyo, whose Roman counterpart is Bellona. The dwarf planet Eris is named after the goddess, as is the religion Discordianism.
Eris has been adopted as the patron deity of the modern Discordian religion, which was begun in the late 1950s by Gregory Hill and Kerry Wendell Thornley under the pen names of "Malaclypse the Younger" and "Omar Khayyam Ravenhurst". The Discordian version of Eris is considerably lighter in comparison to the rather malevolent Graeco-Roman original. A quote from the Principia Discordia, the first holy book of Discordianism, attempts to clear this up:
One day Mal-2 consulted his Pineal Gland and asked Eris if She really created all of those terrible things. She told him that She had always liked the Old Greeks, but that they cannot be trusted with historic matters. "They were," She added, "victims of indigestion, you know."
The story of Eris being snubbed and indirectly starting the Trojan War is recorded in the Principia, and is referred to as the Original Snub. The Principia Discordia states that her parents may be as described in Greek legend, or that she may be the daughter of Void. She is the Goddess of Disorder and Being, whereas her sister Aneris (called the equivalent of Harmonia by the Mythics of Harmonia) is the goddess of Order and Non-Being. Their brother is Spirituality.
The concept of Eris as developed by the Principia Discordia is used and expanded upon in the science fiction work The Illuminatus! Trilogy by Robert Shea and Robert Anton Wilson (in which characters from Principia Discordia appear). In this work, Eris is a major character.
The classic fairy tale Sleeping Beauty is partly inspired by Eris's role in the wedding of Peleus and Thetis. Like Eris, a malevolent fairy curses a princess after not being invited to the princess' christening
Eris serves as the main antagonist of the animated film Sinbad: Legend of the Seven Seas. She controls a vast army of creatures resembling constellations, some of which being Cetus, a giant kraken; Scorpius, a giant scorpion; Musca, a giant fly; Leo, a giant lion; Lacerta, a giant lizard; the Roc, a giant white bird; and the Sirens, a group of water spirits. She appears as a black-haired woman with blue skin, red eyes with yellow scleras, and wears a purple strapless dress.
In the television show, Hercules: The Legendary Journeys and its spin-offs Young Hercules and Xena: Warrior Princess, Discord is a recurring antagonist, Ares's henchwoman and pseudo gun moll. Strife was reimagined as a male character, also a flunky of Ares.
In The Grim Adventures of Billy and Mandy, Eris is a recurring character, often seen with her Golden Apple of Discord. She is an antagonist, though she is represented in a comedic fashion.
In the video game, "Glory of Heracles", Eris is a playable character, although her story is changed a bit, with her being a child, then later being romantically involved with Prometheus.
Eris makes a cameo appearance in the fantasy novel The House of Hades as one of the several children of Nyx seen in the book.
In The New 52 relaunched Wonder Woman title, Eris was renamed "Strife". She is sarcastic, venomous, and a drinker, though both Diana and Hermes consider her mentality to be like that of a spiteful child.
In EVE Online, Eris is the name of the Gallente Interdictor.
In the Light Novel Mushoku Tensei Eris is one of the main protagonists with a very short temper.
In the Freedom City setting, Eris is a high power level antagonist, particularly for player characters with supernatural ties.