Oedipus

Joseph Everest VI is a former Deian Duke in the alternate reality of Earth-1923, who was the prophesied Son of the Mountain destined to defeat the blasphemous Monstrosity. When the moment arrived, Joseph retreated and got his family to safety before engaging him, however, at that moment, Monstrosity had become too strong and utterly defeated him. He would eventually succeed against Monstrosity and prevent him from destroying the other Human worlds, but could not save Earth and it cost him the life of his family. Joseph had decided to instead consume Monstrosity's soul, therein killing both Monstrosity and his little brother, Kyle. He returned home, sunken into a state of depression, and attempted to rebuild New York, but every day more and more people were turning on each other.

Eventually he gave into his anger and slaughtered every Conduit in New York, blaming them for the loss of his family, and sought to prevent a civil war. After he killed all the Conduits, he still couldn't find any solace and then resolved himself to a terrible missive: allow the Averages to multiply with the chance of a Conduit being born and then, with a few sent away, annihilate everyone in a blinding flash, inflicting his own pain on others, believing it would erase his own pain.

Sometime during his perpetual state of agony, he was approached by his Earth-1924 counterpart and offered the chance to enact his revenge and satisfy his bloodlust by coming to Earth-Prime and becoming something far greater than he could've ever imagined, an offer which he accepted and came to Earth-Prime, along with 13 other dopplegangers, and began training for their mission. He would eventually become the vessel for the 11th generation Beta Prime, Samael Mudami, and through Soul Fusion, became Zwarst Nihalam, a member of the Anshomon with the rank "μ".