Board Thread:Questions and Answers/@comment-27456154-20151226202502/@comment-25942629-20161110203936

In a straight-forward battle, I believe Krul could have defeated both Crowley and Ferid. However, she let down her guard. Ferid was very careful to use a sneak attack to surprise her.

Ashera was with the first progenitor, but the first progenitor is a different character. The first progenitor was the one who turned Urd and Saito into vampires, and he disappeared with Ashera 1000 years prior to the current series. We don't know Ashera's ranking as a vampire.

Mika is not a progenitor, but he has the strength of one. As a vampire, it's unlikely he will ever be as strong as Crowley because of the difference in the abilities of their sires as well as their ages and experience, but he is stronger than most of the weaker progenitors. We do not yet know how a vampire earns the status of nobility, so it is possible he could earn the title of a progenitor in the future.

I think Krul will try to protect Yu because he's both Mika's dear friend and a seraph.

I think part of the reason Yu wants to save Krul is because Mika spoke highly of her and because Asuramaru reacted to her. Unfortunately, given their situation, they are dependent on Ferid's knowledge. Plus, Crowley, who is key to solving this situation, serves Ferid, so abandoning him could be a problem. Strategically speaking, they are also in the midst of an enemy camp with very few allies, so saving those few allies might be necessary to their survival.