Oshi no Ko Wiki
Episode 1 4
"It's a secret~"
This article contains SPOILERS to later chapters. Read this page at your own risk.

That's why today I will once again lie... believing the lies will become the truth. Even if I end up paying for it one day...

― Ai Hoshino

Ai Hoshino (ほし) () アイ, Hoshino Ai?」 was the titular character and the poster child of Oshi no Ko. She was the lead idol of the original B-Komachi and mother of Aqua Hoshino and Ruby Hoshino.

As an idol, she lived a life of deceit by pretending to genuinely love her fans. After becoming pregnant with the twins, to not squander her reputation, she gave birth and raised them in secret, playing the role of both idol and mother. However, her lies inevitably caught up with her when she was fatally attacked by a disgruntled fan, using her final moments to tell her children that she loved them.

Even after her death, her influence is felt throughout the remainder of the series, with her daughter carrying on her legacy while her son devoted his life to revenge against the one who sold her out, her ex-boyfriend.

Spoilers Ahead!

It is later implied that one of her co-stars might have been involved in her murder as well.

Quick Answers

What was Ai Hoshino's perspective on lies and love? toggle section
Ai Hoshino believed that lies were a form of love and saw them as a way to express her feelings towards her fans.
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How did Ai Hoshino's attitude change after having children? toggle section
After having children, Ai Hoshino realized the true meaning of love and experienced genuine feelings of love and satisfaction.
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How did Ai Hoshino's personal life differ from her public persona? toggle section
In her personal life, Ai Hoshino was not very social and had few close friendships outside of the entertainment industry. Her public persona was a bright and cheerful act that hid her true personality.
Provided by: Fandom
What was the meaning behind Ai Hoshino's name? toggle section
The name Ai Hoshino can be interpreted as "wild star eyes" and has various meanings, including "love" and "indigo."
Provided by: Fandom


Ai was a beautiful and quite thin girl with gradient-colored eyes from purple to pink and a six-pointed star in each of her eyes. She was shown to have brownish-red hair on the first chapter cover, but it is shown to have more of a blue-purplish hair color on the volume cover.

Her idol outfit was adorned in a pink aesthetic of varying degrees of lighter and darker shades. The outfit's design has an overall ruffled appearance. A black belt is located on her waist, and other miscellaneous accessories are present throughout the design: three blue stars on her chest, a heart-shaped necklace on her neck and a bunny hairpin accentuated by two gold stars and a pink ribbon.


When Ai was very young, her mother Ayumi Hoshino was arrested on a theft charge, and even after her release, she did not care enough to raise Ai anymore, which made her grow up in an orphanage. The environment she suffered being with her abusive mother caused her to think of ways to protect herself. Ai lacked any memory of loving or ever being loved herself, - prominently shown when Ichigo Saitou scouted for idols to start a group. She believed she lacked the qualification to become due to these reasons, showcasing a lack of faith in herself. She became quickly convinced to join when Saitou told her that lying is fine and is, in fact, a desirable trait.

Thus, Ai's perspective started to shift. She convinced herself that lies are a form of love—a love harbored out of the selfish desires of both sides of the spectrum. Ai sought to find an object for her "love.". She wanted to learn how to love by telling her fans that her deceitful lies are, in fact, love. This desire also came when she bore children, but in a different context. She never once said that she loved them because being disingenuous towards them would be terrifying. Nonetheless, she was shown to enjoy her time with her children and was particularly delighted when the twins did an eye-catching performance with idol lightsticks, which stunned the entire venue.

No matter what, lies allowed her to process the world around her. Within these contexts, she never sought to make things right to the point where she was fine to face the consequences of her actions. Lies were her way of expressing love, hoping that one day they would become the truth. Only when a terrible event happened did Ai finally realize she loved her children, a genuine form of love free from impurity and dishonesty. She was relieved and satisfied to finally be able to experience these true feelings. Even before this realization, Ai had grown concerned over their wellbeing and stressed over the prospects of getting better paying jobs in order to provide for them.

According to several characters through the series, Ai had a unique charisma capable of drawing all the attention to herself when she was in the spotlight. Miyako Saitou and Taishi Gotanda commented that Ai was a very uncommon idol and probably they would never get to see anyone like her, stating that she was a rare case among countless idols who wish to be at the top. Ai was notoriously ambitious and a risk-taker to the point of recklessness, best evidenced by her intentions of both continuing her idol career and having children in secret, which was by all accounts extremely dangerous, as it would jeopardize not only her entire career but have harmful ramifications both to her company and coworkers.

When it comes to her private life outside the stage, Ai wasn't very social, and most of her relationships were with people related to the entertainment industry, showing that Ai used to be a loner. Aqua pointed out that Ai didn't have any close friendships, even among her fellow partners at B-Komachi. The seemingly bright and cheerful personality was nothing more than an act that hid her true personality.

It is noted by multiple characters that Ai had disorderly, impulsive, reckless, clumsy, and asocial behavior with a low level of education, a direct result of growing up in an abusive environment. It wouldn't be until she met her boyfriend that she would have a drastic change in attitude, acting more cheerfully, taking better care of her own appearance, acting more femininely, and reducing her self-destructive inclinations. Although said information was private, observers such as Masaya Kaburagi and Akane Kurokawa were able to correctly deduce that she had found a special someone; the latter in particular was able to observe certain character traits common amongst girls with teen pregnancies, and accurately determine that she had given birth in secret.





  • Unknown TV Show[7]



Manga Appearances

Prologue: Childhood
Chapter 1: Mother & Children Debut
Chapter 2: Big Brother & Little Sister Appears
Chapter 3: Babysitter Appears
Chapter 4: How to Smile Appears
Chapter 5: Director & Actress Appears
Chapter 6: Child Actors Absent
Chapter 7: If You Fear Falling, You'll Fall Harder Appears
Chapter 8: Ai Hoshino Part 1 Appears
Chapter 9: Ai Hoshino Part 2 Appears
Chapter 10: Introduction Flashback
Show Business
Chapter 11: Audition Flashback
Chapter 12: The Third Option Absent
Chapter 13: Procedures Flashback
Chapter 14: Connection Absent
Chapter 15: The Manga Drama Absent
Chapter 16: Acting Skills Absent
Chapter 17: Staging Absent
Chapter 18: Modest Praise Absent
Chapter 19: The Entertainment Department Absent
Chapter 20: New Member Flashback
Dating Reality Show
Chapter 21: The Dating Reality Show Flashback
Chapter 22: Wannable Idol Absent
Chapter 23: AMark Absent
Chapter 24: Egosearch Absent
Chapter 25: Up in Flames Absent
Chapter 26: Storm Absent
Chapter 27: Viral Absent
Chapter 28: Role Creation Imagined
Chapter 29: Perfect Copy Imagined
Chapter 30: The First Mentioned
Chapter 31: Love for Real Absent
Chapter 32: Appropriate Age Absent
The First Concert
Chapter 33: Motivation Flashback
Chapter 34: Center Flashback
Chapter 35: Responsible Absent
Chapter 36: The Night Before Flashback
Chapter 37: Pressure Absent
Chapter 38: Group Fan Flashback
Chapter 39: A Job That's Kinda Fun Absent
Chapter 40: Sore Loser Absent
2.5D Stage Play
Chapter 41: Introductions Absent
Chapter 42: Read-Through Absent
Chapter 43: The Losing Heroine Absent
Chapter 44: The Visit Absent
Chapter 45: The Telephone Game Absent
Chapter 46: Theater Absent
Chapter 47: Studio Visit Absent
Chapter 48: Crunch Time Absent
Chapter 49: Rewriting Absent
Chapter 50: Emotional Acting Flashback
Chapter 51: Inquiry Flashback
Chapter 52: Boyfriend, Girlfriend Absent
Chapter 53: Playboy Absent
Chapter 54: Axis of a Conflict Absent
Chapter 55: Opening Pictured
Chapter 56: Beginning of Competition Absent
Chapter 57: Lousy Absent
Chapter 58: Growth Absent
Chapter 59: Admiration Absent
Chapter 60: The Sun Absent
Chapter 61: Play Along Absent
Chapter 62: Ad-lib Absent
Chapter 63: Genius Actor Absent
Chapter 64: Trigger Flashback
Chapter 65: Regret Flashback
Chapter 66: The Curtain Falls Absent
Chapter 67: Drinking Party Flashback
Chapter 68: Liberation Pictured
Chapter 69: Room Tour Flashback
Chapter 70: Flame Mentioned
Chapter 71: Pedestrian Bridge Absent
Chapter 72: Freedom Absent
Chapter 73: Smart Absent
Chapter 74: Takachiho Absent
Chapter 75: Mother and Mother Flashback
Chapter 76: Music Video Flashback
Chapter 77: Reunion Absent
Chapter 78: Use Absent
Chapter 79: Duty Flashback
Chapter 80: Wish Absent
Chapter 81: Rapid Progress Absent
Chapter 82: B-Komachi Night Absent
Chapter 83: Obsessed Flashback
Chapter 84: Hard Selling Absent
Chapter 85: Calculation Flashback
Chapter 86: AD Absent
Chapter 87: Lies Absent
Chapter 88: Offer Absent
Chapter 89: Cosplay Absent
Chapter 90: Compliance Absent
Chapter 91: Dig Deep Absent
Chapter 92: Ritual Purification Absent
Chapter 93: Leak Screen
Chapter 94: Breakthrough Flashback
Chapter 95: Blindness Flashback
Chapter 96: White Roses Flashback
Chapter 97: Together Absent
Chapter 98: Going Astray Absent
Chapter 99: Drinking Absent
Chapter 100: Industry Absent
Chapter 101: Predicament Absent
Chapter 102: Idol and Love Absent
Chapter 103: Scandal Absent
Chapter 104: Countermeasure Absent
Chapter 105: Reporter Pictured
Chapter 106: Breaking Off Pictured
Chapter 107: Friends Mentioned
Chapter 108: Plan Pictured
Chapter 109: Night Absent
Chapter 110: How It Began Flashback
Chapter 111: Mammon-Worship and Passion Absent
Chapter 112: Towards the Future Flashback
Chapter 113: Commercial Work Absent
Chapter 114: Interpersonal Audition Absent
Chapter 115: Roles Flashback
Chapter 116: Responsibility Imagined
Chapter 117: Panda Absent
Chapter 118: Activation Flashback
Chapter 119: Biological Mother Absent
Chapter 120: Lack of Ability Absent
Chapter 121: Sarina Tendouji Flashback
Chapter 122: Doc Pictured
Chapter 123: Bad Move Pictured
Chapter 124: Reversal Flashback
Chapter 125: Dazzled Flashback
Chapter 126: Management Absent
Chapter 127: Scouting A Girl Absent
Chapter 128: Script Reading Portrayed
Chapter 129: Piece Portrayed
Chapter 130: Basic Tactic Screen
Chapter 131: Atonement Portrayed
Chapter 132: Nino Portrayed
Chapter 133: Acting Portrayed
Chapter 134: Depths Imagined
Chapter 135: By Her Side Imagined
Chapter 136: Fight Portrayed
Chapter 137: Idol Flashback
Chapter 138: Amends Absent
Chapter 139: Lookism Portrayed
Chapter 140: Is This Right? Portrayed
Chapter 141: Chain Portrayed
Chapter 142: Responsibility Mentioned
Chapter 143: Blind Follower Portrayed
Chapter 144: Fan of the Originals Absent
Chapter 145: Children Portrayed
Chapter 146: Role Portrayed
Chapter 147: Wish Portrayed
The End of the Play
Chapter 148: End of Summer Absent
Chapter 149: By the Sea Absent
Chapter 150: Knife Imagined
Chapter 151: Catch Ball Absent
Chapter 152: Interview Mentioned
Toward the Stars and Dreams
Chapter 153: Fiction Flashback
Chapter 154: 15-Year Lie Flashback
Chapter 155: Happy End Pictured
Special Chapter Absent
Interlude Chapter 1 Absent
Interlude Chapter 2 Absent
Interlude Chapter 3 Absent
Interlude Chapter 4 Flashback

Anime Appearances

Season 1
Episode 1: Mother and Children Debut
Episode 2: Third Option Flashback
Episode 3: Manga Based TV Drama Absent
Episode 4: Actors Absent
Episode 5: Reality Dating Show Flashback
Episode 6: Egosurfing Absent
Episode 7: Buzz Pictured
Episode 8: First Time Imagined
Episode 9: B-Komachi Flashback
Episode 10: Pressure Flashback
Episode 11: Idol Flashback


Together, her full name means "wild star eyes" as a caricature of her double star eyes. When pronounced, it can also be interpreted as "desires of love".

  • The name Ai, when written in katakana (アイ), means "eye", but when written in kanji (愛 or 藍), it could mean:
    • 愛 - "love, affection".
    • 藍 - "indigo".
  • Ai's surname Hoshino means "star" (星) (hoshi) and "field, wild/wilderness" (野/野生) (no).
    • The pronunciation of Hoshino (ほしの) is similar to (欲しいの), which means "Desire of".


Spoilers Ahead!

  • Ai's death resembles the real-life stabbing of Mayu Tomita, a 20-year-old Japanese singer and actress, in May 2016. Tomita originally became famous by playing a fictional idol named Ai Takano in the web drama Secret Girls. The perpetrator in Tomita's stabbing was a 27-year-old fan who had harassed her online and sent her unsolicited gifts. Twelve days before the attack, Tomita reported the harassment to the police out of fear for her safety, but they dismissed the case. Tomita survived the attack, but received lasting physical and psychological injuries. The incident led the Japanese national government to revise its anti-stalking laws to include online harassment.
  • Ai has two stars in her eyes compared to her children, who only have one each (Aqua Hoshino has one in his right eye and Ruby Hoshino has one in her left).

Ai's starry eyes

    • As the mix of Aqua and Ruby's eyes colors results in purple, this is an allusion that they are half of their mother.
  • Ai's smartphone [9] & blog account password, "45510" is the initial of the four founding members of B-Komachi[10]. The number corresponds to the Japanese flick keyboard:
    • Takamine (た Ta): 4
    • Nino (に Ni): Double 5 (If using a flip phone, double press な Na to get に Ni)
    • Ai (あ A): 1
    • Watanabe (わ Wa): 0
      • The novel 45510 also revealed that through her drafted apology in B-Komachi's former blog, Ai had always wanted to remain friends and reconcile with the other original B-Komachi members, but this is now impossible after her death and the novel's main character deleting the blog.[10]
  • Tsukuyomi remarked that Ai's children were originally "soulless" before the souls of Gorou Amamiya and Sarina Tendouji entered their bodies, implying she had a stillbirth.[11]
  • Ai's glowstick idol color is red, which is the reason why when Ruby becomes an idol like her mom, she also chooses red as her glowstick color.[12]
  • Ai shares her first name with Ai Hayasaka from Kaguya Sama: Love is War, another manga which was also written by Aka Akasaka.


  1. Oshi no Ko Official Anime Website: TALENT -アニメ『【推しの子】』公式サイト- (in Japanese).
  2. Oshi no Ko Manga: Ch. 1 (p. 17).
  3. Oshi no Ko Manga: Ch. 2 (p. 9).
  4. Oshi no Ko Manga: Ch. 7 (p. 3).
  5. Oshi no Ko Manga: Ch. 9 (p. 18).
  6. Oshi no Ko Manga: Ch. 5 (p. 3).
  7. Oshi no Ko Manga: Ch. 5.
  8. Oshi no Ko Manga: Ch. 33.
  9. Oshi no Ko Manga: Ch. 14 (p. 16), Aqua crack Ai's smartphone password.
  10. 10.0 10.1 Novel by Akasaka Aka titled "45510".
  11. Oshi no Ko Manga: Ch. 75 (p. 18).
  12. Oshi no Ko Manga: Ch. 38 (p. 4).


Ichigo Production, Inc
Talent Ai HoshinoTakamineFuyuko NiinoWatanabeMeimeiAriKyun
Independent Aqua HoshinoPieyon
Graduates / Students Kana ArimaAqua HoshinoRuby HoshinoFrill ShiranuiMinami Kotobuki
Current Members Akane KurokawaTaiki HimekawaToshirou Kindaichi (Founder)
Former / Graduates
That Was the Start
Cast Ai HoshinoKana ArimaAqua Hoshino
I'll Go With Sweet Today
Cast Kana ArimaMelt NarushimaAqua Hoshino
Author Yoriko Kichijouji
We're About to Fall in Love for Real
Cast Yuki SumiAkane KurokawaMem-Cho
Aqua HoshinoNobuyuki KumanoKengo Morimoto
Tokyo Blade
Cast Taiki HimekawaKana ArimaMelt Narushima
Akane KurokawaAqua HoshinoSakuya Kamoshida
Author Abiko Samejima
Dig Deep! One Chance
Cast Aqua HoshinoRuby HoshinoKana Arima
The 15 Year Lie
Major Roles Ai HoshinoHikaru KamikiAiri Himekawa
Fuyuko NiinoGorou AmamiyaSeijuro Uehara
Crew Taishi Gotanda (Screenplay, Director)Masaya Kaburagi (Producer)