User blog comment:B214/Volume 22 spoilers/@comment-187.195.211.194-20160726161803/@comment-110.22.98.236-20160726185315

Mr Black would have to be Crom, he has been staying at Issei's & Rias's place since that baby dragon egg was taken there, so using him would be the smart thing to do while these games are running, also don't forget right now if you go by the summaries players don't have to take in EP's if they don't have any but get something more like a rating on what it would be if they did change over,