The way that they made so Zett didn’t always want to have darkness he also wanted a light, to sparkle. Zett was fond of Right because of how much sparkle he made when fighting, not even just fighting. When Zett first saw Right at the amusement park, he immediately notice much sparkle Right was producing. I just love how they build Zett as a character, even in the end when he realized that because of how much darkness he had he could never obtain the sparkle that he so ever so craved. I hope when the 10 years thing comes out he returns!!!