User blog comment:B214/High School DxD EX/@comment-122.180.235.81-20180216084952/@comment-10330822-20200129051604

Who's Azuka? You mean Ajuka?

Issei and Vali are two of the obvious choices. Vali has already hinted to have super devil-potential in the main story, while Issei has beat numerous gods, namely Vidar, who was Top 10-level when Issei fought him.

So the real question is who is the third. I don't think we've been given enough of a reason to assume Saji could be Super Devil-level, because he's not even really Satan-level, and Vritra himself is only Satan-level at best.

My guess is that its Ingvild, Sairaorg, or Kiba.