User blog comment:B214/Volume 23 discussion blog/@comment-185.112.105.215-20170325043119/@comment-30924344-20170329091850

@Omega The 3 confirmed people we know who are Satans in the future are Ajuka, Diehauser and Roygun with their family names becoming two of the three new Satan titles. Someone from the House of Amon becomes a Satan so Amon is the third new Satan title in the future after the Azazel cup and I bet we will be introduced to that person, to give them characterisation like Diehauser and Roygun. The positions left open are Lucifer, Asmodeus and Leviathan. I can see Grayfia becoming Leviathan as she wanted the position originally though Serafall beat her for it and it would keep the tradition of Leviathan being a woman.

For Asmodeus I see Sairaorg becoming a Satan as that is his wish; to become a Satan so he can change the Underworld for the better. Now for Lucifer Vali won't get it, but Issei will until he becomes the ambassador for all mythologies. Vali is not the type of person who is interested in sitting around or politics for that matter. Issei doesn't too however he'd be willing to take on the political position of a Satan knowing he will help a lot of people, with of course Grayfia being his main advisor on the position. She can do that in private times after all.