User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-95.210.189.106-20180507201051/@comment-95.210.189.106-20180508132003

Issei is future candidate to becoming Maou,according with Japan Wiki and Anime suki forum spoilers, about volume 24 secret talks. In EX 200 years of life is prenoted( well a promotion to the Ultimate Class is the thingh that he deserve. Sairog and Rias have give a help for figth the Chaos Brigade, and if they continues to advincing in this tournament when divine beings figths, a promotion to Ultimate Class will be necessary.