User blog comment:B214/Question and Answers 6/@comment-24098614-20181231073306/@comment-10330822-20190107043615

Agreed. It's almost blasphamous for anyone else to have the title. If you don't want him to be in charge of the military like Falbium fine, but don't just make him "Satan" because you want him to be the next Crimson Satan. After all, Sirzechs isn't even "Satan" he's "Lucifer", the group is called the "Four Great Satans". Issei would still be "Satan" regardless. The only real agruement is that Satan is mythology is a dragon, but then again, so is Vali. And that still doesn't change the fact Issei is going to be a Satan regardless of his title.