Originally voiced/sang by Shunichi Toki. Rui is a member of the musical theatre group, Wonderlands X Showtime. Rui is a teasing and playful person who lives by his own set of rules. Which as a result, causes others to consider him a "weirdo". He is always grinning, and at times, gets carried away by his bizarre ideas. Despite his riskiness, Rui does his best to consider the safety of others and subconsciously holds himself back as a result. He deeply treasures his friends and will defend them no matter what.

His voice is gentle and playful. The link listed displays Rui's voice and range: https://www.youtube.com/watch?v=qluofUV07E4&list=PLO7zPEFvc3zBwOAa9Muzz6AkFcXG-Ur-1&index=15