User blog comment:B214/Volume 23 discussion blog/@comment-73.46.6.122-20170322143202/@comment-195.195.244.67-20170322151400

It's not Rudiger because 1. Rudiger is Dulio's coach and he does not fight in the match because it would have been said if he had. 2. The image shows whats going on, at Isseis side and so that guy is there near Issei. He can't be Rudiger because of point one. There's only 2 people it could be and they are Nero or Diethelm.