Ogi is an English teacher at Kaguraya Middle School (Hōtarō Oreki's middle school).
Hōtarō's first impression of him was that he was a little weird. He likes mountain climbing.
He has mildly wrinkled skin, black hair, somewhat droopy gray eyes, and wears yellow-framed oval-shaped glasses.
He taught English to Hōtarō, Satoshi, and Mayaka while they were in middle school. He claims to have been struck by lightning three times. Also, when a helicopter was on his way near the school, he suddnley stops the lesson, went to the window and watch it till he can't see the helicopter anymore. Then he usually laughed, apologized and resumed the lesson, as claimed by Hotaro. This thing happen several times.
|Main characters||Eru Chitanda • Hōtarō Oreki • Satoshi Fukube • Mayaka Ibara|
|Students||Ayako Kōchi • Fuyumi Irisu • Jirō Tanabe • Jun'ya Nakajō • Kaho Jūmonji • Koreyuki Tani • Kurako Eba • Masashi Tōgaito • Mayu Hongō • Misaki Sawakiguchi • Muneyoshi Kugayama • Shōko Yuasa • Tomohiro Haba • Yasukuni Yoshino|
|Other||Jun Sekitani • Haruna Anjō • Kayo Zenna • Masakiyo Ogi • Omichi • Rie Zenna • Tomoe Oreki • Yōko Itoigawa|