Bet you they can't find the stone because either 1 it is in the other fairy dimension only our FL can get to with her magic or 2 the stone is warping their sense of direction until the brother leaves because it senses a threat. It's like the saying you are what you eat but in this case the brothers and asshole because all these ever learned from his parents is how to be an asshole.
I want a stuffy of the princess... where do I place my order