User blog comment:B214/Question and Answers 6/@comment-120.20.138.121-20170109132412/@comment-9595671-20170111154650

Yeah, I think it's similar to how anything from Heaven seems to feel a bit underused in the series, not everyone understands it well because it's not seen often. Especially to those who only fall the anime.

Now that I think about it, we haven't really seen Irina react to the dangers of demonic power, so that's another reason it's hard to see it too. I hope Ishibumi starts fixing this in upcoming volumes so we can see it represented better.