Complex sentence: For Diana, it lowers the person's fortune and determination for the Jewelpet in it's Jewel Form to come out, while Dian's used to Manipulate other Jewelpets to do his bidding.
Split into simpler sentences: For Diana, it lowers the person's fortune and determination for the Jewelpet in it's Jewel Form to come out. While Dian's used to Manipulate other Jewelpets to do his bidding.