User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-30924344-20171219171248/@comment-2602:306:CD9A:C860:A9A4:5B6C:4055:2F13-20171220014131

You're both wrong. The form Rias (Balor of Darkness) is a fusion of Gasper and Rias. While it is a collaboration technique, it is not what you think. Rias becomes a beast wraped in darkness with a thrid eye on her forehead. That thrid eye is Gasper himself that wraps his dark power of Balor around Rias body. Gasper is in the fight but only assist Rias from inside her. It's not like Crimson Extint Dragonar where Rias and Issei fight separately. Rias is using Gasper's power to boost her own stats as well as using Gasper time stop in addition to her own abilities. In that form Rias is at the level where she's on par with an 80% Fenrir which makes her God Class. In that form she's arguebly the 2nd strongest member of her team.