Eris (Ancient Greek: Ἔρις, "Strife") is the Greek goddess of chaos, strife and discord - this means she is often seen as an antagonist, though she is also the central object of worship in the parody-religion known as Discordianism (where she loses her antagonistic role). She is almost always by the side Ares and the two would ravage cities together, Eris would start by making a city's citizens paranoid and petty having them turn on each-other then during the in-fighting Ares would arrive, usually with his armies, to siege the weakened city and burn it to the ground. Though Eris is Ares' aunt once removed she is still younger than him and she considered the sadist war god her role-model. Her name is being translated into Latin as Discordia means "discord".
Eris is also sometimes shorted simply to "strife" and much of her role in mythology is causing trouble between mortals and gods alike - she is also said to be the mother of many lesser "evils" such as Lethe ("forgetfulness"), Ponos ("toil"), Limos ("starvation"), the Algea ("pains"), the Hysminai ("fightings"), the Makhai ("battles"), the Phonoi ("murders"), the Androktasiai ("man-slaughters"), the Pseudologoi ("lies"), the Amphilogiai ("disputes"), Dysnomia ("lawlessness"), Atë ("ruin"), and Horkos ("oath").
His biggest role is probably in the creation of the Trojan War. Furious at not having been invited to the wedding of Thetis and Peleus, she throws an apple of the inscription "For the most beautiful" (Ἡ καλὴ λαβέτω / Hê kalề labétô). This "bone of contention" proves fatal, namely that it provokes the indirect war of Troy after the Judgment of Paris.