My problem with the "looks like a cinnamon roll - looks like they could kill you - is actually a cinnamon roll - could actually kill you" thing is that there's a very big difference between characters that could kill you and characters that would be willing to kill you.
Like, the opposite of "is actually a cinnamon roll" should be "would actually kill you", and there needs to be a z-axis of "has the destructive power of a cinnamon roll" to "living nuclear bomb"