Appearing at the end of the manga series as well as the 5th movie, Rupa is the prince of a world of total darkness, giant mushrooms, and flying pigs. It was arranged by Rupa's great-grandfather that he would marry Lum. Rupa never met her but he was still intent on marrying her. Since she wasn't willing to go with him he kidnapped Lum after accelerated her growth so that her horns fell out (causing Lum to lose her powers until they'd grow back). His black robes which all of his people wear, kind of makes him look like a trash bag.