User blog comment:Stbk22/Possible power up/Techniques 2 for New Arc/@comment-86.153.129.0-20160807065853

I agree that for the moment Issei doesn't need a power upgrade, But I wonder if it possible that Saji will gain something like a Juggernaut drive. Also now the Ravel is in Issei's peerage I would like to see her to deveolp more advanced combat fire magic.