|Name in Japanese||九十九七瀬|
|Romaji Translation||Tsukumo Nanase|
|Debut (Anime)||Chuunibyou Demo Koi Ga Shitai! Episode 01 - An Encounter with...the Wicked Eye|
|Debut (Light Novel)||Chuunibyou Demo Koi Ga Shitai! Volume 1|
|Appears in||Anime, Light Novel|
|Voice Actor (Japanese)||Kikuko Inoue|
|Voice Actor (English)||Carli Mosier|
She is voiced by Kikuko Inoue in the original anime spoken in Japanese. In the English dubbed version, She is voiced by Carli Mosier.
Nanase has blue eyes and short brown hair.
Nanase is a very passive woman who cares deeply for her students where she is fair among her students and punishes those that make mistakes.
- The name Nanase means "seven" (七) (nana) and "swift current, rapids" (瀬) (se).
- Nanase's surname Tsukumo means "Ninety-nine" (九十九).