Mimura has light brown hair styled in bowl cut, light-colored eyes (orange-brown and green in the anime) and he is noted for having a plain appearance.
Audio & Video Production: Mimura has a passion in this field and has displayed skills in it as well.
Keen Eye Vision: Mimura demonstrates keen vision as his field in video production, making his vision more sharper than most of his classmates as shown in Chapter 145 where he can spot anyone from a hundred meters.
Reconnaissance: Because of his plain appearance and his knack for directing and production which has enabled him to have a wide view, Mimura is suited for reconnaissance. This is brought to light during Chapter 145 where he was responsible for leaking the formation of the Blue Team's formation to Karma.
- The name Koki means "navigation" (航) (ko) and "bright" (輝) (ki).
- Koki's surname Mimura means "three" (三) (mi) and "town, village" (村) (mura).
- He was called "Mushroom Director" during class 3-E training using code names.
- His best subject is Social Studies while his worst subject is Biology.
- His future goal is to work on a TV show.
- He was in the Film Research Society before dropping to Class E.
- He likes Yukiko Kanzaki.
- His hobbies/special skills involve artistic appreciation DVDs and playing the air guitar.
- During the Civil War, he was eliminated when Isogai spotted him scouting and shot him.
- He got an invitation from Sosuke Sugaya which the latter said "Hey, we should make a film together!"
- He also got one from Taiga Okajima which the latter said "Hey… we should make a film together, yeah…"
- His school rankings are:
- First Term Midterm: 89th, 341 points
- First Term Finals:26th, 427 points
- Second Term Midterm: 37th, 410 points
|Kunugigaoka Junior High School|
|Faculty||Korosensei • Tadaomi Karasuma • Irina Jelavić • Aguri Yukimura|
|Students||Masayoshi Kimura • Hinano Kurahashi • Yuma Isogai • Hinata Okano • Hiroto Maehara • Meg Kataoka • Kotaro Takebayashi • Toka Yada • Koki Mimura • Rio Nakamura • Nagisa Shiota • Kaede Kayano • Taisei Yoshida • Yukiko Kanzaki • Taiga Okajima • Rinka Hayami • Tomohito Sugino • Yuzuki Fuwa • Takuya Muramatsu • Kirara Hazama • Ryunosuke Chiba • Manami Okuda • Sosuke Sugaya • Sumire Hara • Ryōma Terasaka • Karma Akabane • Itona Horibe • Ritsu|
|Faculty||Gakuho Asano • Kiyoshi Terai|
|Students||Tomoya Seo • Teppei Araki • Natsuhiko Koyama • Ren Sakakibara • Gakushu Asano • Kaho Tsuchiya • Kazutaka Shindō • Kokona Tagawa • Nobuta Tanaka • Chousuke Takada|