User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-77.182.213.61-20180706173845/@comment-10330822-20180713031503

I don't think anyone is denying he's getting stronger and that his soul is coverting. The question is what does that mean for his base body?

The question here I feel is can Issei one day take on a Satan-Class enemy without using Boosted Gear? That's what I feel the OP was really asking.