Rui is undeniably an easy-going genius. He's meticulous about making every show the best it can be, making use of his flair for technology and inventiveness. He lives by his own set of rules so many consider him a weirdo. Along with despising vegetables, he also dislikes a large majority of fruits, such as watermelon, as they share the same texture. He is also a teasing and playful person, with an example being his constant ideas for performances that often involve putting Tsukasa's life danger.