Kaguya-sama wa Kokurasetai Wikia
Kaguya-sama wa Kokurasetai Wikia

Spoiler Alert! This article or section contains details not covered in the anime. Do not proceed unless you wish to be spoiled.

I don't hate you. I just think that I would only do that with someone I love who loves me back. That's why... I'm going to try my hardest to become someone that you can fall in love with.

—Yu to Tsubame, Vol. 16. Chapter 156, Page 13

Yu Ishigami
Japanese 石上 優
Rōmaji Ishigami Yu
Nickname Yu-kun (by Tsubame Koyasu)
Yu-chin (by Koromo Shiranui)
Age 16 (As of Chapter 200)
Gender Male
Birthday March 3rd (Pisces)
Hair Color Dark Blue (Anime / manga)
Black (Live action)
Eye Color Dark Blue (Anime / manga)
Brown (Live action)
Height 169 cm[1]
Blood Type O
Hobbies Playing video games, reading manga
Residence Nakameguro, Meguro Ward[2]
Personal Status
Status Alive
Occupation Student
Student Council Treasurer
Cheer Club Member (Formerly)
Culture Festival Committee Member (Formerly)
Year Level Freshman (1-B) (Formerly)
Junior (2-A) (Current)
Relationships Unnamed parents
Unnamed older brother
Japanese VA Ryouta Suzuki
English VA Austin Tindle
Actor Hayato Sano
Media Debut
Manga Chapter 11 (Cameo)
Chapter 24 (Actual)
Anime Episode 1 (Cameo)
Episode 6 (Actual)

Yū Ishigami (石上 優いしがみ ゆう, Ishigami Yuu) is one of the protagonists in the Kaguya-sama wa Kokurasetai series. He is a second-year high school student at Shuchi'in Academy, a former member of the Cheer Club, and the current treasurer of the high school Student Council.


Ishigami is based on Isonokami no Maro (石上 麻呂), the fifth suitor from The Tale of the Bamboo Cutter. His depressed personality is based on the fact that his counterpart attempted to obtain a cowry shell from a swallow's nest, only to fall to his death with bird poop in his hand.


Ishigami is a good-looking, albeit gloomy, teenage boy of a slim build. He has chin-length black hair that covers the left side of his face; he typically wears a dull expression further amplified by his black eyes.

In the past, Ishigami described himself as being a jock. He had an athletic build and short hair that resembled Tsubasa's. However, years of inactivity led him to lose his muscle.


Ishigami is a reserved and somewhat gloomy student who would rarely show up to the student council meetings, preferring to do most of his work at home. He normally spends most of his time playing video games by himself, as he is generally be disliked by the other students due to an incident that occurred in his past.

Ishigami has an incredibly cynical and depressing outlook on life, often going on long rants against youth and the other students who he refers to as “normies”. This discontent very obviously comes from his own misery and loneliness as he seems very jealous of the guys who are popular and manage to get themselves a girlfriend. Ishigami can be quite awkward at times, making statements that cause others to see him as a creep. That being said, he is quite snarky and is often the one to make sarcastic remarks pertaining to the situations he gets in.

Despite his negative attitude, Ishigami is a kind and well-meaning student who suffers from an inferiority complex and he is ultimately willing to help others in need, even if it means sacrificing his own pride, and even advised Kaguya Shinomiya to not associate herself with him simply because it may lower her reputation.

Ishigami enjoys playing video games and reading manga. He also has wide knowledge about otaku culture, such as how mangaka or anime production works, as well as manga tropes. Despite this, he hides the fact that he is into anime due to a fear of being called an otaku and only ever discussed it with Miyuki. He also listens to anime music.


Ishigami is the second son of the president of a small toy company who was able to enter Shuchi'in thanks to the hard work of his father and is the only one that has a high school degree. Not academically driven, he can only put his effort into things that interest him. He possesses exceptional observational skills. However, this causes him to notice the things that other people are most insecure about; landmines people do not want to be touched on deep in the bottom of their hearts. These insecurities that other people hide are as clear as the clothes they wear to him.

He avoids obvious taboos that no ordinary person would dare to touch, but the observations he makes are not always immediately obvious to him as being landmines. He frequently disturbs and sets off these landmines because he cannot tell that they are, in fact, untouchable landmines. He used to skip school as a matter of habit, but Miyuki Shirogane scouted him for treasurer as soon as he entered high school, forcing him to attend.

He had beaten up Ko Ogino, the president of the drama club for not stopping his acts of cheating on Kyoko Ootomo back in middle school. In desperation, Ogino framed Ishigami for beating him up because he was jealous of having Kyoko as a girlfriend, this has led to widespread rumors and flooding hate from people, as well as a long-term suspension that did not end until he wrote an apology. The hate from all the people, the suspension, and the effect of this on his familial relationships at home led to his self-confidence and self-esteem being replaced by misery and negativity. And in the end, he was never able to write an apology letter because he wouldn't let himself do it. Miyuki had investigated and had discovered the truth about his suffering and was the only one to understand and believe that he was not at fault. He was recruited for the student council soon after for his data analysis and processing skills.

As mentioned in the anime, Ishigami was the fastest member in the track club.

At some point, under pressure to participate in school club activities, Ishigami decides to join the Cheer Club, captained by his senior Kazeno. It is in the cheer club that he first comes across Tsubame Koyasu, an upbeat third-year student that is kind to everyone and he considered her to be one of the prettiest girls in the school, alongside Kaguya Shinomiya. Ishigami develops a crush on Tsubame that he inadvertently confesses his feelings for her at the school's cultural festival. Ishigami does not realize that his actions were perceived as a confession by the rest of the student body and is therefore oblivious to the implications of having given Tsubame a heart-shaped gift (considered akin to a confession in Shuchiin tradition). After some convincing by Kaguya, Tsubame decides to seriously consider Ishigami's confession, with her original intention being to let him down as gently as possible. It isn't until Ishigami watches Tsubame's performance of the traditional play that gave rise to the aforementioned tradition that he realizes his actions had unintended meaning. Even then, Ishigami's thickheaded nature prevented him from recognizing the full meaning of his actions: a straight confession.


  • The name Yu means "excellence, superiority, gentleness" (優).
  • Yu's surname Ishigami means "stone" (石) (ishi) and "above, top, upper" (上) (kami/gami).


  • Ishigami's long bangs serve as a physical barrier for him to not have to see things he doesn't want to and are also a manifestation of his fear of others.[3]
    • Due to his bangs, his left eye is seldom (not often; rarely) seen.
  • Ishigami has a keen sense of problem-solving, as shown by him solving the mystery of why Nagisa Kashiwagi was mad at Tsubasa Tanuma several times.[4]
  • Ishigami was terribly afraid of Kaguya Shinomiya and feared that she might one day kill him.[5]
  • Ishigami once stated that he was a jock back in middle school.
  • Ishigami's LINE icon is an anime character.[6]
  • Ishigami used to wear briefs but switched to boxers after being embarrassed by Chika Fujiwara.[7]
  • Ishigami is a genius when it comes to analyzing and processing data but he fails in exams horribly. It is due to the fact after he was forced to write a letter to Ko Ogino he could not and stayed at home all the way to high school. Staying at home still had an effect on his studies.[8]
  • Ishigami's mother is a florist.[9]
  • In the first 72 chapters of the series, Ishigami's speech bubbles have a rough edge like most of the other male characters in the series. From Chapter 73 on, his speech bubbles can be described as boxes with rounded corners, which probably indicates that the author decided on Ishigami having a smoother/softer but still somewhat masculine voice from that point onward.
  • Ishigami plays Crypto in Apex Legends and is in the Diamond tier of its Ranked Leagues.[10]
    • Ishigami's squad composition of Crypto, Revenant, and Wraith was popular during Season 5 of Apex Legends. Coincidentally, Season 6 of Apex Legends launched around the same time the chapter came out and directly nerfed the synergy between Crypto, Revenant, and Wraith.
  • As much as he is a shut-in, he has some intelligence and he even has a bit of a temper the minute something seems off.
  • Ishigami shares his birthday with Fujiwara.
  • In the episode 32 Ishigami had made a reference to The Shawshank Redemption



  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
Shuchi'in Academy Student Council
Shuchi'in Academy High School Current: Miyuki ShiroganeKaguya ShinomiyaChika FujiwaraYu IshigamiMiko Iino

Former: Previous Student Council PresidentMomo Ryuju

Shuchi'in Academy Middle School Moeha FujiwaraKei Shirogane
Shuchi'in French Academy High School Betsy Beltoise
  v  e
Shuchi'in Academy Clubs
Archery Club Kaguya Shinomiya
Astronomy Club Momo Ryuju
Cheer Club KazenoTsubame KoyasuRei OnoderaYu Ishigami
Kendo Club Kojima
Mass Media Club Shizuku AsahiErika KoseKaren Kino
Occult Research Club Yume Atenbo
Soccer Club Shindou WatabeMoriKazuTakkun
Tabletop Gaming Club Kozue MakiharaChika FujiwaraTerashima
Volunteering Club Nagisa KashiwagiTsubasa TanumaMaki Shijo
  v  e
Culture Festival Committee
Tsubame KoyasuMiko IinoYu IshigamiDaiki SatoMasaru KobayashiTeppei TanakaRei Onodera
  v  e
Ishigami Family
Yu IshigamiIshigami's Brother