Aria Argento(アリアアルジェント; Ariaarujento) is a supporting character in the fanfic Highschool DxD: Legacy. One of the DxD children, devils descendants of Issei with one of the original girls of his harem, in her case Asia Argento, Aria is Ichijou's mentor and Nemesis' Queen. She's Nemesis best friend/lover and strongest Piece, the new secretary in Kuoh Academy and one of the main antagonists of the second Volume, together with Nemesis, the eponymous Crimson King.