Oshi no Ko Characters — Complete List & Profiles

Ai Hoshino （星野 アイ）

Idol / Mother of Twins

Ai Hoshino was the charismatic center of the idol group B-Komachi, widely adored as a once-in-a-generation star. Her bright, carefree smile captivated countless fans, yet behind that radiance existed a complicated inner world shaped by a deep craving for love. Having grown up in an unstable environment with little affection, Ai learned to treat lies as a talent—using carefully crafted emotions to fulfill the “love” expected of an idol.

Despite her outward perfection, Ai carried an earnest desire to understand and experience genuine love. This longing became especially evident in her role as a mother. She cherished her twins, Aqua and Ruby, with sincere affection, finding moments of real happiness while trying to balance motherhood and her demanding idol career.

Ai’s untimely death becomes the catalyst that drives the entire story forward. Her life, choices, and the lies she wielded as a shield continue to influence the destinies of those connected to her. Ultimately, Ai embodies the fragile line between illusion and truth within the world of entertainment, leaving behind a legacy that shapes every character in Oshi no Ko.

Aqua Hoshino (Aquamarine) （星野 愛久愛海）

Actor / Ai’s Son

Aqua Hoshino, the son of Ai, drastically shifts the purpose of his life after witnessing her tragic death. Reincarnated with memories from his previous life, he possesses a calm, mature mindset unusual for his age. Yet deep inside, he carries overwhelming guilt and simmering hatred. His obsession with finding the person responsible for Ai’s murder becomes the driving force behind every decision he makes.
Entering the entertainment industry, Aqua uses his intelligence and natural acting talent to uncover hidden connections and approach the darker corners of show business. Though he appears emotionally distant, his affection for Ruby and his concern for those around him show that he is not entirely consumed by revenge. As he navigates a world built on lies and illusions, Aqua struggles to discover his own identity and determine what “truth” means to him.

Ruby Hoshino （星野 瑠美衣）

Idol / Ai’s Daughter

Ruby Hoshino is a cheerful and energetic girl who deeply admires her late mother, Ai. Unlike Aqua, who is driven by revenge, Ruby focuses on hope and pursues her dream of becoming an idol with pure determination. Her desire to shine like her mother fuels her positivity and ambition.
As she enters the entertainment industry, Ruby grows through her interactions with new friends and rivals, revealing her hardworking and competitive nature. Her trust in Aqua is absolute, and she remains unaware of the darkness he carries within. Ruby serves as a symbol of light within the story, supporting others with her brightness and unwavering sincerity.

Kana Arima （有馬 かな）

Actress / Idol

Kana Arima was a prodigy actress known as the “genius who could cry in ten seconds.” Her outstanding talent earned her massive popularity as a child, but as she grew older, public expectations became harsher, leading to a period of self-doubt.
Despite these struggles, Kana perseveres through her pride and discipline, eventually regaining her shine as a member of the new B-Komachi. Sensitive and expressive, she embodies both vulnerability and strength, often pushing herself too hard due to her competitive nature.
Kana develops complex feelings toward Aqua, respecting his abilities while gradually becoming drawn to him. Her journey—marked by insecurity, resilience, and emotional growth—makes her one of the most relatable characters in the series.

Akane Kurokawa （黒川 あかね）

Actress / Method Performer

Akane Kurokawa is a young actress known for her sincerity, emotional sensitivity, and exceptional acting skill. Her immersive method-style approach allows her to completely embody a role — a gift that earns her admiration, but also brings emotional strain.
After being harshly targeted in a reality dating show scandal, Akane suffers deep psychological wounds and experiences the darker side of the entertainment world. Yet these hardships ultimately deepen her craft, enabling her to reproduce Ai’s persona with astonishing accuracy.
Akane develops strong feelings for Aqua, stemming from the moment he saved her during her lowest point. She is one of the few characters capable of sensing the pain and darkness hidden behind Aqua’s calm exterior.

MEM-cho （MEMちょ）

Idol / Creator

MEM-cho is a cheerful and approachable influencer-turned-idol with a warm, friendly charm. Having spent years as a streamer, she excels at creating a sense of closeness with her audience.
Though her casual attitude may seem carefree, she carries a strong sense of responsibility and has worked tirelessly to support her family. After joining the new B-Komachi, she becomes a mood-maker who brightens the group while also taking her idol career seriously.
Her positive personality, combined with her resilience and emotional maturity, makes MEM-cho a beloved character who brings balance and lightness to the story.