Komori Kiri is student #20 of class 2-F. She is a hikikomori, a shut-in. Kiri now currently resides in an unused classroom after Nozomu visits her house in an attempt to get her to come to school. She also occasionally shows up in a number of random enclosed spaces, often wrapping herself with a blanket. Her name in eastern order is derived from komorikiri, meaning "it stays at home", and in western order her name sounds similar to hikikomori.
|Characters of 91 Days|
| Tarou Sekiutsu | Kafuka Fuura | Manami Ookusa | Kanako Oora | Meru Otonashi | Ai Kaga | Chiri Kitsu|
Kaere Kimura | Abiru Kobushi | Kiri Komori | Matoi Tsunetsuki | Miko Nezu | Nami Hitou | Harumi Fujiyoshi
Madoka Marui | Shouko Maruuchi | Mayo Mitama | Rin Itoshiki | Kotonon