^I don't even know what that's supposed to mean. Should intelligent yukkuri die intelligently? Should fast yukkuri die quickly? Should funny yukkuri die in a comical fashion? And how the fuck does something "die stupidly" in the first place?
Destroying the shell would have been enough. You could see just how badly it was shaken-up.
Nah, with their biology, they will soon forget all of those "uneasy things" and soon it will just then do whatever it did in the first place unless it is a well-trained one, cuz even a silver-badged can soon forget all of the training it got once it experienced something easy. Back to the story, this Reimu thought that it would be immortal as long as it got this shell, so no sooner or later it will be dead anyway, due to now it would not hide from any other dangerous things like predators, other yukkuri, people, vehicles, etc