User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-2607:FB90:4A89:72ED:A0CF:1772:80B1:E181-20190620093332/@comment-34061653-20190623085320

It's becaise Asia was there that Fafnir could hold off Crom. Even without Fafnir, her BxB has incredible defense as it can nullify attacks. She was able to nullify Crom's attacks. It was a great strategy against Rias team as the goal was to take out the king. Asia was the perfect person to hold off Rias strongest fighter because she's nearly impossible to get rid of. Losing Asia didn't matter as long as Issei doesn't fight Crom or Strada to get to Rias.

Kiba vs Xenovia can go either way because of Excalibur sheath and due to her stamina, she could outlast him. Kiba couldn't do much against Issei as his attacks even with Gram could only produce cracks in Issei's armor.

Considering Koneko is not only physically stronger but also has access to all kinds of Senjutsu and was able to beat Kuroka, it's very impressive Ravel was able to hold out. Many people (including myself) believed if Koneko fought Ravel in her 3 tailed state, than she would retire Ravel but that wasn't the case.