User blog comment:B214/Volume 23 discussion blog/@comment-30924344-20170301120940/@comment-30924344-20170301135549

Anything to do with the Old Satan Faction is done and dusted. It wouldn't make sense to bring up a relative of Shalba who has no justifiable reason to go and be friendly with Issei, let alone fight for him considering every descendant except Vali of the satans are assholes and so Bina would be an antagonist instead. Antagonists don't hide their identity in this series.