User blog comment:B214/High School DxD EX/@comment-177.142.209.126-20160104161947/@comment-27391142-20160104162557

I haven't finished reading the full volume 20 yet, but from what i can tell is 666 is woken up near the end. So i am assuming that will be the new enemy until it is defeated and who knows where the story will go after that.