List of Oshi no Ko characters

The Oshi no Ko manga series features an extensive cast of characters created by Aka Akasaka. The story follows a doctor and his recently deceased patient are reborn as twins to a famous Japanese musical idol and navigate the highs and lows of the Japanese entertainment industry as they grow up together through their lives.

Aquamarine Hoshino / Aqua


Originally an obstetrician-gynecologist in his mid-thirties named Gorou Amamiya (雨宮 吾郎), Aquamarine Hoshino (星野 愛久愛海) (also known as Aqua (アクア)) was a big fan of Ai Hoshino and also responsible for delivering Ai's babies. He met his demise after Ai's stalker killed him, causing him to be reincarnated as the son of Ai himself. When his mother was killed, he swears to discover the truth behind the murder. He theorizes that his father is in the entertainment industry and suspects he may be responsible for giving information about Hoshino's whereabouts, which leads him into pursuing a career in acting to find him and avenge his mother and murder his father. He temporarily starts dating Akane, but breaks up with her for her safety after she discovers his true motivation for tracking down his father.

Ruby Hoshino


Ruby Hoshino (星野 瑠美衣) was originally a terminally ill patient named Sarina Tendōji (天童寺 さりな) under the care of Gorou, she finds herself reincarnated along with her twin-brother, Aquamarine, as the daughter of Ai Hoshino. Before her reincarnation, Sarina obsessed over idols and dreamed to become one. A few years after being reincarnated, Ai is murdered. After Ai's death, Ruby trains to be an idol like her mother was. However, she is still not very good at singing. At the age of 14, Ruby auditioned to become an idol but was rejected through a fake phone call made by Aqua, who did not want her to follow in Ai's footsteps. Instead, Miyako offers Ruby the opportunity to form her own idol group under Strawberry Productions. The idol group, named B-Komachi in honor of Ai's old group, consists of her, Kana Arima and Mem-cho. As Sarina, she was deply in love with Gorou, and these feelings resurfaced when she discovered that he reincarnated as Aqua, despite the fact he is currently her brother.

Ai Hoshino


A popular and charismatic pop idol. Ai Hoshino (星野 アイ) lived in the countryside without her father, missing from birth, and her mother, who was arrested. She grew up in an orphanage, and at age 12, she was scouted by the president of Strawberry Productions, Ichigo Saitou, to become an idol. Ai did not believe she could become an idol due to not knowing love. Ichigo explains that she can lie and pretend to show love to her fans. She eventually becomes the face of the idol group B-Komachi. At age 16, Ai became pregnant with twins. She decided to give birth to them and hid these facts from the world so she could have the experience of a loving family, and took a hiatus from her idol activities. After the birth of her twins, who she named Aquamarine and Ruby, she returned to work. At age 20, she was murdered by an obsessive fan who tracked her to her new apartment. In the last moments of her life, she realizes that she really loved her children, and wished to be a bigger part of Aqua's and Ruby's lives, finally able to feel what it was like to truly love. Her death became the impetus for her son, Aqua, to pursue an acting career in order to seek revenge on her killer. Her name in Japanese can translate to "starry eye", in reference to the six-pointed stars visible in both her and her children's eyes.

Kana Arima


Kana Arima (有馬 かな) was considered an acting prodigy as a child and known as "a genius child actor who can cry in ten seconds", and Ruby refers to her as "the child who licks baking soda". Kana first met Aqua when a movie she was featured in needed an extra and Aqua, who had accompanied Ai to the shoot, stepped in at the request of director Gotanda. As a teenager, the number of roles she got declined because she would always steal the spotlight from her peers. To survive in the industry, Kana decided to hold back her acting talent. Kana reunited with Aqua and Ruby in high school and found herself falling in love with Aqua, even though he does not reciprocate. She was still struggling to make it big as an actress when Aqua and Ruby persuaded her to join Ruby's idol group, B-Komachi, and Kana became the focal member of the group. After two years in B-Komachi, Kana leaves the group to focus on her revived acting career.

Akane Kurokawa


Akane Kurokawa (黒川 あかね) is a stage actress who signs up for a teenage reality dating show, My Love with a Star Begins Now (LoveNow), where she meets Aqua. During the show, Akane was an overlooked contestant who wanted to make her presence known in order to promote the Lalalie Theatrical Company she is affiliated with. On an episode of LoveNow, she accidentally scratched fellow cast member Yuki Sumi in the face. Viewer backlash resulted and Akane was targeted and sent insults and death threats on social media, which caused her to become suicidal. Aqua intervenes before her suicide attempt can succeed. Near the end of the show, her image improves due to the efforts of the rest of the cast, and Aqua kisses her during the last episode. They decide to stay together as a couple after the show ends to maintain appearances, and Akane later genuinely falls in love with Aqua, which only fuels Kana's jealousy. Her approach to stage acting has her research the characters she is playing and infer much about their motivations and characteristics, much like method acting. Several months into their relationship, she figures out Aqua's plans to avenge his mother and vows to support him any way she can. However, Aqua breaks up with her soon after for her own safety. When Aqua enters the final phase of his plan for revenge against his father through Ai's biographical film, she vows to stop him from giving in to his darker impulses before he is irrevocably changed.

Ichigo Saitō


Ichigo Saitō (斎藤 壱護) is the president of Strawberry Productions. He is the husband of Miyako Saitō. Ichigo was responsible for the recruitment of Ai Hoshino to B-Komachi. He acts as the caretaker for Aqua and Ruby after Ai's death. Soon after Ai's death, he disappeared for a decade until Ruby tracked him down in order to get advice on her own plans for revenge on her mother's killer. Soon after, he was tracked down by Aqua as well, and expressing a fellow desire for revenge on the killer, assists Aqua with his plans.

Miyako Saitō


Miyako Saitō (斎藤 ミヤコ) is the wife of Ichigo Saitō and acts as the primary caretaker for Aqua and Ruby after Ai's death. She manages Strawberry Productions and keeps the business afloat after the disbandment of the original B-Komachi and the disappearance of Ichigo.

Mem-cho


Mem-cho (MEMちょ) is a YouTuber and TikTok influencer who signs up for LoveNow. She pursued her dream of becoming an idol, but was unsuccessful due to her family situation. She decided to become a streamer and lied about her age to gain many followers. After LoveNow, Aqua recruits her to B-Komachi. She was reluctant due to her age, but ultimately decides to join.

Pieyon


Pieyon (ぴえヨン) is a anonymous famous physical training Youtuber affiliated with Strawberry Productions, who coaches choreography for B-Komachi members. He makes over 100 million yen a year.

Frill Shiranui


Frill Shiranui (不知火 フリル) is a student of Youtou High School's Performing Arts Program and one of Ruby's classmates. She is a multi-talented performer who can sing, dance, and act. She later is expected to play Airi Himekawa in Director Gotanda's and Aqua's planned Ai biographical movie after originally being chosen for the role of Ai before allowing Ruby to play the role following a self audition where she was impressed by Ruby's acting skill and conviction.

Melt Narushima


Melt Narushima (鳴嶋 メルト) is a model and actor affiliated with Sonic Stage Productions. He was an arrogant and untrained actor when playing the male lead in the Sweet Today live-action adaptation, but still managed to deliver a solid performance for the final scene after being provoked by Aquamarine Hoshino. The experience humbled him and he has worked on improving his acting skills by the time he joined the stage production of Tokyo Blade. He later is expected to play Goro Amamiya on Director Gotanda's and Aqua's planned Ai biographical movie.

Minami Kotobuki


Minami Kotobuki (寿 みなみ) is a student in the Performing Arts Program of Youtou High School and a classmate of Ruby and Frill. In the show business industry, she works as a gravure model.

Yuki Sumi


Yuki Sumi (鷲見 ゆき) is a fashion model and a participant in the reality dating show The Beginning of My Love With An Idol or LoveNow. Initially imagining she would fade into the background, she used her character to create drama and interest.

Taiki Himekawa


Taiki Himekawa (姫川 大輝) is an award-winning stage actor affiliated with the Lalalie Theatrical Company, first seen as the main star of the Tokyo Blade stage production. It is later revealed that he is also Aqua and Ruby's older half-brother, conceived when his mother cheated on his legal father with their father. However, he himself remains unaware that he is the product of an affair.

Taishi Gotanda


Taishi Gotanda (五反田 泰志) is the film director who scouted Aqua and convinced him to become an actor when he saw his potential. After Ai's death, he recruited Aqua as his student at Aqua's request. He is one of the few people who knows the real identity of Aqua. He was once recruited by Ai to make a documentary film of her prior to her death. The creation of this biographical film of Ai's life is part of Aqua's plan of revenge against his father and Ai's killer.

Masaya Kaburagi


Masaya Kaburagi (鏑木 勝也) is a producer affiliated with an internet TV Station Dot TV!, and producer of the Sweet Today live-action adaptation and the webshow ''Dig Deep! One Chance''. He seems to have deep ties with Ai at the past.

Yoriko Kichijouji


Yoriko Kichijouji (吉祥寺 頼子) is the mangaka behind the popular manga series I'll Go With Sweet Today and Abiko's mentor. She also serves as producer for its live action drama where Kana is starring.

Abiko Samejima


Abiko Samejima (鮫島 アビ子) is the mangaka behind the popular manga series Tokyo Blade, and became a producer for its stage play after expressing displeasure with how its adaptation and script was progressing. She used to be Yoriko's assistant and student.

Hikaru Kamiki
Hikaru Kamiki (カミキ ヒカル) is the mastermind of Ai and Gorou's murders, and the biological father of Aqua and Ruby. He was raped by a married adult actress who gave birth to his first child, Taiki, when Kamiki was only eleven years old. At age fifteen, he met Ai at the Lalalie Theatrical Company where he was teaching as an alumnus, and the two began a brief relationship resulting in her pregnancy with the twins. He is suspected by Aqua to have recruited an obsessive fan of Ai to commit her murder, and has been involved in numerous orchestrated murders of other actresses. He is identified by Akane through clues gleaned from Aqua and her own research into Ai after she comes across him at a film awards ceremony, which leads Aqua to move forward with his plan for revenge.

Crow Girl
Crow Girl is mysterious unnamed girl in the woods who is a seemingly supernatural being aware of everything that transpires within the story, including Aqua and Ruby's reincarnation. She was originally a wounded crow who was rescued and cared for by Gorou and Sarina until it passed away. At Aqua's request, she manifests in the real world to portray the infant twins in 15 Years of Lies.