Avidility

Avidility, born Adhm Rehan and known commonly as AVI, is the main antagonist of Part 4, and one of the most threatening villains in the entire series, with influence being felt long before his first appearance. One of the most vile creatures to ever roam the earth, he wields a mighty army of e-girls and teenage boys who do his bidding.

Though ultimately defeated following the conclusion of Part 4, his whereabouts remain unknown, though he's probably still trying to steal money from horny boys for his Siege addiction.

History
Whatever AVI was up to before Part 4 remains a mystery, but what is known is that he just showed up one day, dressed as a woman (which for whatever reason, people believed).