Hikaru Kamiki

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

- Hikaru Kamiki

Hikaru Kamiki (ひかる) is the primary antagonist of the Oshi no Ko manga series. He is the man who fathered Aqua Hoshino and Ruby Hoshino with Ai Hoshino and the person implied to have leaked Ai's address to a disgruntled fan, leading to her death and prompting his son to devote his life to tracking him down and getting revenge.

Appearance
Hikaru is an attractive man who bears great resemblance to his son, to the point that Akane Kurokawa almost mistook him for the latter. Similar to Ai Hoshino and their children whenever they embrace the darker aspects of their personalities, Hikaru also has a black star in each eye.

Whilst in public, Hikaru hides his true appearance using a variety of disguises, seemingly taking particular care to hide his eyes. When he went to visit Ai's grave, he wore a long overcoat with a hat and sunglasses. Whilst passing Akane, he once again wore sunglasses but this time put on a black suit, as he was at a high-class gathering. During his interactions with Yura Katayose, he tied his hair in a ponytail and kept his eyes closed.

Personality
Hikaru is a sadistic and possibly insane murderer who enjoys watching the life fade from his victims, who are primarily actresses at the top of their career, claiming that it makes him "feel the weight of his own life". It is implied that he was molested by a married adult actress when he was just 11 years old, which could be what warped him to be the twisted man he is today. However, the fact that he bothered visiting Ai Hoshino's grave implies that he truly did love her, albeit in his own twisted way.

As a former aspiring actor, he can skillfully hide his true nature in public by taking on the guise of a rather casual and dependable individual who others can lean on. He also has a habit of sending white flowers to up-and-coming actresses, though this could just be a method to draw in new victims.

When carrying out his murders, Hikaru appears to be a highly cautious individual careful to leave no incriminating evidence, attacking his victims in isolated locations and injuring them in ways where their deaths could be mistaken for accidents. His modus operandi seems to be to get close to his targets using his public persona and only strike when the conditions are perfect. When younger, he primarily made use of proxies, being implied to have been the one who leaked Ai's address to a disgruntled fan and the one who told the husband of the actress who took advantage of him about their affair.

Known Facts

 * Hikaru was 15 years old when he got Ai Hoshino pregnant.
 * Hikaru is referred to by Ai as "(her) ex" and she later referred to how their children would understand "(their) situation", implying that the relationship between them was mutually broken off.
 * Hikaru was only 11 years old when he fathered Taiki Himekawa with Airi Himekawa.
 * Because of this, it is likely that Airi, who was already a married adult at the time, was the one who instigated their relationship, molesting and taking advantage of the boy.
 * Taiki remains unaware that Hikaru is his biological father, believing it is Seijuurou Uehara.
 * As noted by Akane Kurokawa and Aqua Hoshino, Hikaru cannot be judged under the Japanese legal system for his role in the murders of Ai Hoshino and Airi Himekawa since he was a minor at the time.
 * However, this could change if his recent murder of Yura Katayose was discovered.

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.
 * While it is implied that it was because Hikaru was molested at age 11 that he became the murderer he is today, some fans debate whether this is indeed the case or if he was always this way by nature.