Aoi, Gengo

アオイ＝源吾

Dr. Gengo Aoi is the grandfather of Kazuya and Kazuha, and a member of the Chevalier. He is the scientist who developed the Pandora, Limiters, and Stigmata. His latest project, aptly named Valkyrie, was intended as a counterweight to Pandora but was initially dismissed; however, following recent events, it has been reintroduced and activated.