User blog comment:Mnzombie/Issei's Peerage/@comment-71.108.70.155-20131114195856/@comment-1359322-20131115022152

The Queen is someone the King trust to the fullest after all like Akeno and Tsubaki is to Rias and Sona, it's the same to Riser too, so Issei's Queen will be someone he trust to the fullest, as to who no one knows.