User blog comment:FrankieX98/The future members of the Issei's harem and peerage./@comment-2601:584:C400:82A0:C861:CFB9:7C8:845C-20181206200804/@comment-2208155-20181207141050

I thought that Erebus was in Issei side.. Or maybe I read one fake spoiler os somebody confused me..

Or maybe during shin dxd 3 part of this volume(life4(for example) will be dedicated to that battle.. I am with you that the battle against SlashDog team is more important for him.