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 proxy murdering the latter by revealing her address to a disgruntled fan, prompting his son to devote his life to tracking him down and getting revenge.

Appearance
Hikaru is an attractive man, bearing great resemblance to Aqua. Similarly to Ai, he has star on each eye, although blackened in color.

Personality
Hikaru is a sadistic serial killer who enjoys watching the life fade from his victims and primarily targets female idols and actresses. His normal modus operandi is to first get close to his targets, sometimes even sleeping with them, before having them killed off. Even as a child, he already showed himself to be a playboy who impregnated Ai Hoshino while in middle school and had an affair with Airi Himekawa when he was just 11 years old, causing Akane Kurokawa to describe him as being "sick". 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 his targets for him; for Ai, he used a disgruntled fan whilst for Airi he manipulated her husband into committing murder-suicide with her by telling him about their affair. He also makes sure that his proxies are all mentally unstable people who will likely commit suicide out of guilt after their part is played, ensuring that they do not talk. Even when things do not go according to plan, he is always close to the scene to dispose of any unplanned variables. As proficient as he might be, however, both of Hikaru's proxy murders left a single clue that allowed Aquamarine and Ichigo Saitou to trace the murders back to him: the proxies possessed information that only the victims and himself should be privy to.

Over the years, he seems to have become bolder and more daring, now no longer relying on proxies and killing his targets with his own hands. However, he is still highly cautious, drawing his targets to 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 in the countryside. He is also highly patient and willing to shadow his targets in disguise for a long time until a perfect opportunity arises.

Aside from his lustful and murderous tendencies, he appears to be rather haughty and somewhat narcissistic regarding 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".
 * Hikaru's surname Kamiki means "god, deity" (神) (kami) and "tree, wood" (木) (ki).

Trivia

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