Aqua Hoshino

A relatively handsome 18-year-old actor with blonde hair with long bangs hanging on the left side of his face and aquamarine blue eyes with a star on his right eye.

He may be cold, calculating, cunning and discreet. He’s sometimes emotionally distant and is said to be a psychological manipulator.

He can also be possessive and dominant with a slightest bit of a sadist in him.

He often changes his appearance due to his job as an actor.

Due to being Ai's son, many people were able to point out their similarities despite being unaware of his pedigree. Much to Aqua's dismay, as before Chapter 105, he wanted to keep the truth about his late mother from being known to the general public. He also bears a strong resemblance to his biological father Hikaru Kamiki.

In his previous life, he was known as Gorou Amamiya, a medical doctor who was murdered by a stalker of one of his patients, Ai Hoshino, and reincarnated as the latter's child.

An orphan and a fan of Ai in his previous life, he enjoyed being her child, entering the entertainment world from an early age. Unfortunately, this happy life ended when the same stalker who killed him in his previous life murdered his new mother as he watched. This event fundamentally changed him, prompting him to go down down the dark side of the entertainment industry to find the person who sold Ai out, his father.

Before the tragedy that struck his family, Aqua was considered relatively normal other than his unparalleled prodigious talent in acting even as a child and his quick wit and intelligence like reading complex books. With him retaining his past experiences, he accomplished many things not expected for someone his age. Performing acting jobs was something he was open to and excelled at.

After the tragedy that killed his mother, Ai Hoshino, he changed and became cold, calculated, cunning, and discreet, willing to do whatever means necessary to see his goal of finding his father through. His psychological trauma from Ai's murder tends to resurface anytime he seems to forget his goals. This is the case when Kana Arima suggested that he'd look back at his happy memories in Chapter 50 to improve his acting on the spot. It is a case of Post-Traumatic Stress Disorder and doubles as an active reminder to not stray from his original purpose of vengeance. He blames himself for being weak-willed during that moment, even though he was but a child. However, he used these negative emotions to exemplify his acting performance during his scenes in the Tokyo Blade Theatrical.

Aqua is described as someone with emotional distance; he is shocked when he hears from Kana that he is ''gloomy'', but despite this, he does genuinely care about the people close to him. Aqua is overly protective of Ruby, his younger twin sister. It is mainly described by Taishi Gotanda, his mentor, as someone with a sister complex, which is understandable since he was initially unwilling to let his sister become an idol and suffer the same fate as their mother. Thus, he surreptitiously destroyed almost every chance Ruby could get to be promoted due to this overprotective nature, despite knowing how she longed to follow in their mother's footsteps. Ultimately, he helped Ruby and the new B-Komachi group prepare for a gig so they could accomplish a task long thought impossible. He was also one of the main driving forces behind a project that served to save Akane Kurokawa's reputation.

After being told that his father, the main reason for his quest for vengeance, was dead, he becomes warmer to those around him and begins smiling more. He ponders whether he could now be happy and live normally as he recalls his girlfriend's smiling face. Moreover, he becomes more supportive of Ruby's ambitions and encourages her to do her best. He was deeply ashamed of himself for continuously using Akane for his own selfish ambitions, but after she broke down, he wiped her tears and vowed to keep her safe as he gave her their second kiss that was removed from ulterior motives.

After learning he was mistaken in assuming his father was dead, he has a mental breakdown at the realization. As a result of this and discovering his father's true identity, he becomes even more cold and calculating than before. He even develops black stars in both of his eyes, similar to Ruby. He's even gone as far as believing that he won't survive once everything is over, saying his actions are necessary so Ruby can live once he's gone.

Throughout the series, Aqua shows signs of being a psychological manipulator. While he has shown to care for those around him, at the same time he also uses them to further his and Ruby's goals.

Arguably, Aqua's greatest talent is his ability to mimic as demonstrated when he puts on a disguise and pretends to be Pieyon. His mimicry is so uncanny that he is able to fool his own sister.

In terms of acting, it is Aqua's nature to reenact samples that he saw somewhere, as noted by Kana. And after watching tapes of his performances when he was younger, Akane Kurokawa concludes that Aqua's acting was all planned ahead of time. Furthermore, Aqua has also demonstrated his ability to improvise on set. Taken together, it suggests Aqua follows the Meisner technique, an acting technique that emphasizes on emotional preparation, repetition exercises, and improvisation.

Due to working for Taishi Gotanda as an intern, Aqua has also become proficient at editing videos.

Cold, calculating, cunning, discreet, controlling, emotionally distant, psychological manipulator, possessive, dominant, sadistic, charismatic, enigmatic, charming, cynical, astute, observant