Arfoire (マジェコンヌ, Majekon'nu) is the main antagonist of the series, who will not stop until she defeats the four goddesses and takes over Gamindustri once and for all. She used to be an acquaintance with Histoire but after splitting Gamindustri into four parts, Arfoire turned against her and decided she wanted to have all of Gamindustri.

In Mk2, She has a one on one duel with Nepgear in the True Ending. She is called the Deity of Sin and seeks to destroy Gamindustri. She is also a CFW and the main purpose for ASIC is to resurrect her.

In Hyperdimension Neptunia Victory she is one of the Seven Sages.

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