User blog comment:B214/Talk About What You Want! 3/@comment-7401186-20141104112658/@comment-24468758-20141104181219

Rias only seems weak compared to her peerage as she rarely ever fights, is at the front line or we get to read about her fight.

In Vol 17 however she was taking on mass produced evil dragons on her own as Sairaorg and Issei did whereas the rest of the group formed teams of two with one attacking and one supporting.