User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-34061653-20181013135327/@comment-33341107-20181018150038

So the fact that he can summon a heavenly dragon who isnt a familiar and costs him no pieces everone is fine with, but a singing girl is unfair ... really? Ajuka, the leader of the underworld already knows who Ingvild is and he asked Issei to look after her, Shiva said hes scarier than Sirzechs so I imagine if he says Issei's queen is a Leviathan than evrtone is going to accpet it. Tobio, who answers to the Grigori knows who she is, so they probably do, Cao cao knows who she is so The leader of the Hindus probably knows who she is. The devils will see Issei as a traitor for having a maou descendant queen? You do remember that they want Vali, a Lucifer descendant, to be a maou right? She could end up boosting Crom? She wss able to enable Issei to destroy an anti dragon Garment thst he previously couldnt do anything to but sure she wont be able to not boost the bad guy. Even if she boosts crom thats it for Rias' team meanwhile ever member of Issei's team, most of whom are already more powerful than most of Rias', will be getting boosted. We dont know what length of time will have past by the time Issei and Rias fight, for all we know it could have been a month and Ingvild has done nothing but train in that time.