Hikaru Kamiki

"Ruby Hoshino, you have grown into a beautiful woman. Of course she would, since she's our kid."

- Hikaru Kamiki

Hikaru Kamiki (神木 ひかる) is the primary antagonist of the Oshi no Ko manga series. He is the man that fathered Aquamarine Hoshino and Ruby Hoshino with Ai Hoshino before having the latter killed through proxy by revealing her address to a disgruntled fan. It is later revealed that he is a serial killer who seduces his targets, who are primarily idols and actresses, before killing them.

Personality
Hikaru is a sociopathic serial killer who primarily targets female idols and actresses. His normal modus operandi is to first get close to his victims, and sometimes seduce or even sleep with them, before having them killed off. Even as a child, he showed himself to be a playboy who had an affair with Airi Himekawa when he was just 11 years old. He might also be incestuous, having seemingly gained an interest in his own daughter. Whilst in public, he skillfully hides his true nature by taking on the persona of a rather casual and dependable individual whom others can lean on, which he uses to draw in new targets.

Much like his son, Hikaru has shown himself to be highly thoughtful and sophisticated when it comes to enacting his kills. To ensure that none of his crimes could be traced back to him, he usually acts through proxies whom he manipulates into killing her targets for him; for Ai Hoshino, he used a disgruntled fan whilst for Airi he manipulated her husband into committing murder-suicide with her by telling him about their affair. Over the years, however, she seems to have become more daring, now doing the killing himself. However, he is still highly cautious, attacking his targets in isolated locations and injuring them in ways where their deaths could be mistaken for an incident, as seen when he pushed Yura Katayose off a mountain whilst hiking.

Aside from his murderous tendencies, he appears to be rather proud and somewhat haughty about his good looks, believing it is only natural for his daughter to be pretty since she is his child.

Known Facts

 * He is referred by Ai Hoshino as "(her) ex", and she later referred to how their children would understand "(their) situation", implying that the relationship between them were mutually broken off.
 * He is implied to have fathered Taiki Himekawa with the married Airi Himekawa secretly.

Etymology

 * The name Hikaru is written in hiragana (ひかる), which has no special meaning. However, when written in kanji (光 or 輝), it could possibly mean :
 * 光 - "light".
 * 輝 - "brightness, radiance, shine, sparkle, gleam, twinkle".
 * His surname Kamiki means "god, deity" (神) (kami) and "tree" 木 (ki).

Trivia

 * Hikaru was born in Kanagawa.
 * Hikaru graduated from Faculty of Science.