User blog comment:B214/Volume 17 spoilers./@comment-82.178.123.133-20140220134919/@comment-24502975-20140220143131

The more I read DxD, the more I come to notice... Ishibumi's a genius. lol. We can rarely predict what will happen; for instance, I really thought Euclid and Grendel would cause terror for a longer period of time. Belial being a traitor was totally unexpected. But like B214 said, this was probably all planned for some future purpose. Euclid being out of the picture 1 volume after the Fake BG is revealed is way too short.