User blog comment:Crimson and Darkness/DxD Updates 2~/@comment-39089654-20190616194100/@comment-10330822-20190619103433

It's a common gag in manga that strong men are afraid of scary females. Like Chi-Chi from DBZ scares Goku, despite the fact if she slapped him she would break her hand on his face.

It doesn't really matter whether Tiamat *actually* is a threat or not. The point was she is scary enough that Issei is terrified regardless.

However, she does not seem all that unreasonable, since she probably knows inside that Issei personally is not responsible for her lost treasure, she just holds him responsible on the surface because she can't rely on Ddraig.

I'm more curious what will happen to their relationship once the treasure is returned to her.

Roygun is obvious, especially since the wedding dream, not to mention she is a shotocon.

Gabriel and Serafall are more likely than Grayfia. Because I suspect the one thing Issei wouldn't do is lay his hands on another person's woman. And no matter how you look at it, if he did, it'd feel too much like he is taking advantage of her because Sirzechs isn't there.

On the other hand, Issei is biologically immortal, so him waiting to pursue Serafall until after Trihexa was beat is not out of line. Gabriel also seems to be willing to go to bizarre lengths for the sake of the Angels, and that could possibly included getting pregnant to have strong children.