Lord of the Flies

No full look at this yokai has surfaced. The only hint came when Koki tapped its power to strengthen Rin, briefly exposing a single eye. Separately, the kozuka knife that siphoned Koki's ability rendered the Lord of the Flies in the shape of an ordinary housefly.

Going by its first known bearer, Koki Yukishiro, the power commands and gathers tiny living things such as insects. Koki triggered it through piano playing, though whether the original owner needed any such ritual stays unknown. Saint-Germain remarks that her extraordinary gift, likely her knack for sensing the pygmies, let her boost the ability well past its prior reach. The power can also merge and amplify other abilities, as when Koki strengthened Rin's gravity control and altered both their outfits in the process.

At some unspecified moment, this yokai crossed paths with Saint-Germain, who used a kozuka knife to draw out its power for himself. From there the stolen ability changed hands, landing with Koki Yukishiro and afterward with Vlad. The name itself harks back to Beelzebub, a demon whom Peter Binsfeld, in his ranking of the demons, tied to gluttony, one of the seven deadly sins.