Kana Arima

Verified Timeline

Lore & Background

Kana Arima is an actress who, twelve years after Ai Hoshino's murder, is recruited by Ruby Hoshino to form a new idol group named B-Komachi, alongside YouTuber Mem-cho. She is a high school student at the time, working with the twins Aqua and Ruby under the management of Strawberry Productions. Kana's acting career began in childhood, and she is shown to be a skilled performer, though she struggles with the shifting demands of the industry. Her relationship with Aqua is strategic, as he leverages their friendship to further his investigation into his father. The spin-off novel *Oshi no Ko: Futari no Etude*, released on December 18, 2024, delves into her past and future, as well as that of actress Akane Kurokawa, making Kana a focus of both a spin-off and a sequel to the original story.

In Their Own Story

Kana Arima's journey in *Oshi no Ko* begins when she is recruited by Ruby Hoshino to join the revived B-Komachi, alongside Mem-cho. As a former child actress, she brings experience and talent to the group, but also carries the weight of her past. Throughout the series, she is a key ally to Aqua, who uses their friendship to advance his investigation into Hikaru Kamiki. Her role becomes more prominent in the second spin-off novel, *Oshi no Ko: Futari no Etude*, which explores her history and future alongside Akane Kurokawa, offering deeper insight into her character beyond the main narrative.

Reader's Guide

Kana Arima is a major character in *Oshi no Ko*, first appearing in the manga and anime as a member of the new B-Komachi, formed by Ruby Hoshino. She is a high school student and actress, working alongside Ruby, Mem-cho, and Aqua under Strawberry Productions. Her backstory as a child actress is referenced, but the primary source does not provide extensive details about her early career. For fans seeking more, the spin-off novel *Oshi no Ko: Futari no Etude* (released December 18, 2024) focuses on her and Akane Kurokawa, offering additional context. Key moments include her recruitment into B-Komachi and her strategic friendship with Aqua, which plays a role in his investigation. Always refer to the official manga chapters (serialized April 2020 to November 2024) and anime seasons (first aired April to June 2023, second July to October 2024, third January to March 2026) for verified details.

Did You Know?

• Kana Arima is a central character in the spin-off novel *Oshi no Ko: Futari no Etude*, which focuses on her past and future alongside Akane Kurokawa.
• She is recruited by Ruby Hoshino to form the new B-Komachi, alongside YouTuber Mem-cho.
• Kana is a high school student during the main events of the series, twelve years after Ai Hoshino's murder.
• Her friendship with Aqua is strategic, as he uses it to further his investigation into Hikaru Kamiki.
• The novel *Oshi no Ko: Futari no Etude* was released on December 18, 2024, and serves as both a spin-off and a sequel to the original story.