User blog comment:B214/Volume 23 discussion blog/@comment-27083298-20170318234409/@comment-10330822-20170319030158

Well, at least you can count on Issei never getting a big-head, every time he reaches a new level of power someone is always there to emasculate him. It's the story of his life. Still, I find it kind of amusing she needed someone like Crom to replace Issei, because, let's be honest, Issei made up at least half of Rias's team's power.