Khelfin watched Aro going into a fiery rage. He remembered when he himself used to be so full of emotion and it made him realize how cold he had actually gotten. In fact, the news of the murder did not even devestate him. Tho he did feel some sort of sadness. 

When asked about Cooper's intentions, Khelfin felt like he could wage in on the matter. 

"My mission was to find upgrade items for his artificial pokemon and boycot the fossil hunters while I was at it so they could not grow more powerful faster than he did. If you ask me, he is after power and control. His intentions were pure at first, he wants to rebuild our world. However, the power he tasted seems to be leaving him in a spot where he keeps wanting more and more. Im not sure if he is capable of murder but he is extremely motivated to lead this new world. I think he is also recruiting others to form sort of gyms. Bottom line is that he will control everyone if he gets his way."