Kumin Tsuyuri is a junior in high school who loves naps. She joins Yuta and Rikka on their daily adventures.
Kumin Tsuyuri was created by Toroka for the light novel series Even People with Adolescent Delusions of Grandeur Want To Experience Love! in 2011 as a supporting character for the series. She was adapted into the anime Chūnibyō Demo Koi ga Shitai! by Tatsuya Ishihara in 2012. Rikka is voiced by Azumi Asakura in the Japanese anime.