User blog comment:B214/Volume 22 spoilers/@comment-175.110.173.31-20160912005212

you know ive been following issei character development for a while read the entire dxd from vol 1 why is it that issei doesnt master one of his powerups gets another one and then issei gets powerup that couid easily brutalize a heavenly dragon class being so does vali but both cant handle the output so ophis has to tone it down. My question is what icheibumi trying to do he gives rias god class beings for her peerage and issei gets the weaklings issei hasnt even vaguely mastered true queen which is supposed to give power on par or stronger then juggernaut drive the author gives him another form why cant the author commit did he forget about true queen altogether if he did then he is no differnent then some crappy fanfic author