User blog comment:B214/General Discussion/@comment-24098614-20160610191318/@comment-24098614-20160610211149

I am surprised that Trihexa was sealed because Issei is strong but not powerful enough to seal him he must have needed major help even with the power of Great Red and Ophis inside of him he would still need major help from powerful sources.

I also noted that the Three Maous are sealed so that means there is no Sirzechs and others that is simply horrible meaning that most Factions lost all of their leaders.