Kaguya-sama wa Kokurasetai Wikia
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Hey everyone, I'm Koromo Shiranui...I'll try my best to come to class this year...Nice to meet you all...

—Koromo Shiranui, Vol. 21 Chapter 211 Page 15

Koromo Shiranui

Koromo Shiranui.png

Japanese 不知火 ころも
Rōmaji Shiranui Koromo
Personal Status
Status Alive
Occupation Student
Year Level Freshman (1-B) (Formerly)[1]
Junior (2-A) (Current)
Media Debut
Manga Chapter 105 (First Mentioned)
Chapter 166 (First Appeared)
Chapter 211 (Face reveal)

Koromo Shiranui (不知火しらぬい ころも, Shiranui Koromo) is a supporting character in the series. She is a second year student at Shuchi'in Academy and one of The Impossible Girls.


Koromo's name is derived from the Robe of the Fire Rat (火鼠の裘), the object from The Tale of the Bamboo Cutter that Abe no Miushi (Hifumi Abe's counterpart) had been tasked with collecting.


Koromo has a shoulder-length light-colored hair that is clipped with two veil-shaped ornaments on each side of her head.

She is shown to wear hoodies on top of her school uniform.


Koromo is implied to be a rather intelligent girl due to her placing in the top 50 of her class in the second semester finals. She also enjoys playing video games in her spare time.


Koromo first appears in Chapter 211 where she arrives late on her first day in 2nd year.


  • Koromo's surname Shiranui means "phosphorescent light" (不知火).
    • Phosphorescence is relating to a type of light that glows softly in the dark and that does not produce heat.


  • As of the second semester finals, Koromo is ranked 49th among the first year students [2].
  • As of the third semester finals, Koromo is ranked 41th among the first year students [3].
  • Many fans of the manga comment that Koromo has the similar appearance as Nino Nakano, a character from the 5-toubun no Hanayome series.
  • It's mentioned in an interview that Koromo might be the older sister of Frill Shiranui from Oshi no Ko, but Aka Akasaka hasn't decided how the timeline for the two series line up yet.


  1. Twitter
  2. Chapter 105 page 14
  3. Chapter 198 page 19


  v  e
Shuchi'in Academy High School
Faculty Adolphe PescaroloKomari MachidaHikaru Oobayashi
Third Year 3-A: Daiki SatoTerashimaPrevious Student Council PresidentTsubame Koyasu
3-B: Kazeno
Unknown Class: KazuMoriShizuku AsahiYume Atenbo
Second Year 2-A: Ai HayasakaKaguya ShinomiyaMirin HinokuchiSubaru Suruga
2-B: Chika FujiwaraGo KazamatsuriMaki ShijoMiyuki ShiroganeNagisa KashiwagiSaburo ToyosakiTsubasa Tanuma
2-C: Erika KoseHayato HongoKaren KinoMasaru KobayashiMomo Ryuju
2-D: Shindou Watabe
Unknown Class: KaoruMiipanTetchanToshiko
First Year 1-A: Kozue Makihara
1-B: Kobachi OsaragiKoromo ShiranuiMiko IinoRei OnoderaYu Ishigami
1-F: Teppei Tanaka
Unknown Class: Kojima
Unknown Year MakiSarinaShigechiiTakkun
  v  e
The Impossible Girls
Tsubame KoyasuMomo RyujuKoromo ShiranuiKobachi Osaragi