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|Name in Japanese||五月七日 くみん|
|Romaji Translation||Tsuyuri Kumin|
|Debut (Anime)||Chuunibyou Demo Koi ga Shitai! Episode 02 - Priestess of...the Melody|
|Debut (Light Novel)||Chuunibyou Demo Koi ga Shitai! Vol. 3 Ch. 4|
|Appears in||Anime, Light Novel|
|Voice Actor (Japanese)||Azumi Asakura|
|Voice Actor (English)||Emily Neves|
|Birthday||October 14 (Libra)|
|Age||16 (S1) 17 (S2) 18 (Movie)|
|Height||155 cm (5'1")|
|Weight||54 kg (119 lbs)|
|Title||Second Year High Schooler (Anime only)|
She is also a founding member of the club Rikka Takanashi formed named as Far Eastern Magic Napping Society of Summer.
Kumin is in the second year of high school student attending Icho Private High School. She likes napping very much and she considers it her hobby. In her first year, she tried to form a "Nap Club" at her school but failed because no one was interested in joining, during her second year she met Rikka Takanashi and Yuuta Togashi, which she agreed to join their club. Kumin is generally very laid-back and rather naïve, which is probably at least partly because she was home-schooled for many years.
Kumin lives with her family and went overseas for her dad’s work after kindergarten. She was subsequently home-schooled until high school, and due to being overprotected by her family, she is innocent and naïve, with old-fashioned ladylike ethics and behavior. In her second year of high school, she collaborates with Rikka Takanashi's plan to create a club, and managed to form the nap club, albeit in a heavily modified form.
Kumin has dark purple eyes and short black hair. She has very fair skin and a small mole on her right breast.
Kumin is a very friendly but rather pure and innocent girl who loves sleep so much that she brings a pillow with her almost everywhere she goes. After getting along with Rikka Takanashi and Sanae Dekomori, she tries to understand their delusions and always supports their activities despite her own lack of understanding. After Makoto Isshiki has his head shaved as his self-decided punishment for polling the girls' ratings among the boys in his class, Kumin liked to feel his bald head out of curiosity. She also enjoys scenes where fighting and horror occurs.
- Kumin's surname Tsuyuri means "five" (五) , "moon" (月), "seven" (七) and "sun, day" (日).
- Tsuyuri is an unusual reading for Kumin's family name 五月七日; Yuuta Togashi initially pronounces this as the far more common "gogatsu nanoka", meaning "May 7th".
- "Do you nap? Huh? It's nice. A sunny day is perfect weather for napping. I'm Kumin Tsuyuri, nice to meet you!"
- "Yep! It's sunny today so I brought my sunny spring day pillow. I dream about grassy meadows when I use it."
- Kumin is one of the many characters not to appear in the light novel until Volume 3 .