User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-24098614-20140715222152

I can't believe that the House of Bael wants for Issei to become a Maou because isn't there a rule that to become a Maou yo have to be a Pureblooded Devil because they are rather touchy abut letting a hybrid become a Maou sure Issei might have charima but the Noble Clans won't be happy in seeing a hybrid like him become a Maou.