Oshi no Ko: Why did the father turn into a serial killer? Explained

Hikaru Kamiki
Hikaru Kamiki's first proper appearance in the manga (Image via Aka Akasaka/Shueisha)

Since the start of Oshi no Ko, fans have been wondering about the identity of Aqua and Ruby's father. Although anime fans have yet to catch up on it, the revelation of the same has been confirmed in the manga. While Aqua seems to be close to his revenge, it is yet to be revealed why his father turned into a serial killer.

Oshi no Ko, written by Aka Akasaka and illustrated by Mengo Yokoyari, has become overly successful since its release and has managed to become one of the highest-rated anime series of 2023. In addition, the anime's recent success has helped boost the manga's overall performance.

Disclaimer: This article contains spoilers from the Oshi no Ko manga.

What was Ruby and Aqua's father's goal in becoming a serial killer in Oshi no Ko?

Ai Hoshino and Hikaru Kamiki as seen in the Oshi no Ko manga (Image via Aka Akasaka/Shueisha)
Ai Hoshino and Hikaru Kamiki as seen in the Oshi no Ko manga (Image via Aka Akasaka/Shueisha)

While it cannot be said with certainty why Hikaru Kamiki targets women in the first place, it is possible that the reason stems from his affair with Airi Himekawa. Hikaru was only 11 when he got Airi pregnant, who was older than him and married. Hikaru was an aspiring actor then and Airi a well-established actress, suggesting he was molested. The trauma might have pushed him to like killing others, as he claims to feel the weight of his life while watching Yura Katayose die.

As Oshi no Ko manga fans would know, Hikaru Kamiki, the founder of the talent agency Kamiki Productions, is the person who fathered Aqua and Ruby Hoshino by impregnating Ai at the old age of 15. Four years later, he pushed the disgruntled fan, Ryosuke, into murdering Ai by giving him information about news on Ai's pregnancy and her children.

However, this was not the first time that Hikaru Kamiki had committed such a crime. As per Akane Kurokawa's detective work, Hikaru had impregnated renowned actress Airi Himekawa at 11. Following that, he let her husband, Seijuurou Uehara, know about her wife's actions and how she had a child with someone else. As a result, this may have driven Seijuurou to kill his wife and himself, which inadvertently led to the media publishing the deaths as a double suicide.

Hikaru Kamiki (Image via Aka Akasaka/Shueisha)
Hikaru Kamiki (Image via Aka Akasaka/Shueisha)

That being said, it is to be noted how Hikaru Kamiki has the habit of sending white flowers to up-and-coming actresses. This is a way for him to mark his next target and draw them towards himself. Readers of the manga know that Hikaru had sent white flowers with Ryosuke while having him murder Ai. In addition, he sent Akane Kurokawa white flowers when she won a prestigious award, which might be a sign that she was his next target.

However, what do these women have in common that makes them Hikaru's target? The criteria might be for the targeted victim to have white-starry eyes, which is a way to illustrate positive determination. All of his known targets in the series, i.e., Ai Hoshino, Yura Katayose, and Akane Kurokawa, were seen with white-starry eyes. As for Airi Himekawa, given her level of career, it can be presumed she had a pair of them as well.

Nevertheless, Hikaru Kamiki has based his decisions to kill women on how he opened his agency, which would inadvertently help him to recruit and monitor promising young female entertainers and murder them as per his wishes.