You Don't Believe Me?

Grey and Klaus had no idea what the town chief did to the people they just killed, neither did they care. 

Although this attitude of theirs seemed extreme, it's pretty common in the world of Elementalists. Only the strong are allowed to walk and do whatever they want freely, status and family background means nothing in front of those who are truly strong. 

This was exactly why the Emperor didn't want to take the chance of giving them the opportunity to grow stronger. Once they were stronger than the rest of the people in the continent, then it didn't matter if the opponent was an Emperor or the Crown Prince, they could do whatever they wanted when offended.

They could even forcibly take the throne from the current Emperor and there was nothing he could do. Of course, none of them had such plans. Maybe except for Klaus, given his personality, he'd probably want to be in a very high place.