User blog comment:ChishioKunrin/What Chapter 12: Breach Needed/@comment-11188061-20141106062626/@comment-11188061-20141107050751

Wouldn't make sense. The whole Kingdom is walled away and secured by lengths of wall strong enough to keep the Grimm away for god knows how long. Sure, the Nevermore could fly over them, but I doubt that Vale has no anti-air defenses that can shoot down any stray Nevermores that come too close. If Coco's mini gun can do that, I'm very sure that Vale's anti air defenses can too.

Honestly, if Nevermores can just fly into the Kingdom without hindrance do you think the people will be so panicked?