User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-2607:FB90:3830:25B5:0:F:D1CF:1F01-20190119145940/@comment-34061653-20190119165943

What do you mean? If Roygun and Ravel didn't get Issei out of there, Rias would've caught him in time stop. Since Issei wasn't transformed, he would've been helpless.