User blog comment:B214/Shin DxD 1 discussion/@comment-32252462-20181118121622/@comment-2601:87:8300:20D0:7031:923C:82EC:84C9-20181118125157

That sounds like a rip off and Ingvild singing isn't just a weapon. Even Issei said he likes her song that it's really nice and really helped them out. I think they are already happy and I think it's a bit too late about your claim at the bottom. It's true that they may grieve, but they are moving forward and a big change is happening for all species, mythological beings, gods and other religions. That's why the Azazel Cup is here, so your character isn't necessary for the plot of the story, it just doesn't make sense, so I don't think it would work.