Taiki Himekawa

He is a fairly attractive 22-year-old award-winning stage actor affiliated with the Lala Lai Theatrical Company with purple eyes, square-rimmed glasses, and tamed black hair.

As an award-winning star actor from the Lalalai Theatrical Group, he is a senior in their line of work, has a mature yet fairly laid-back personality, but quite... A company to have when going out on a cozy coffee date or a pleasurable night out at the bar. He is also talented and efficient when it comes to his roles, and while having a steady composure, he has shown to have little to no tolerance when it involves those who hurt or harm others. His cool-minded disposition is but a mask to how depressing he truly is for not only having witnessed murder-suicide of his parents as a child as well as having seen several actors and actresses die due to having paid the price of fame and fortune.

He is later revealed to also be Aqua and Ruby Hoshino's older half-brother, conceived when his mother, Airi Himekawa, had an affair with their father, Hikaru Kamiki, and prompting his legal father, Seijurou Uehara, to commit murder-suicide with her after he learned about it.

Taiki was born to Hikaru Kamiki (when he was 11 years old) and Airi Himekawa, who was married to Seijuro Uehara at the time. Taiki said that he was picked up by Toshirou Kindaichi from an orphanage, presumably after his parents' death, and has been raised by Toshirou ever since.

For the Tokyo Blade theater play, he is cast in the role of Blade, the protagonist of the story. After the play, he finds out that he are Aqua are relatives by blood after the latter perform DNA tests for everyone involved in the play. Later for The 15 Year Lie movie, he is cast the role of his legal father.

He does not own eye contacts and chooses to deliberately go without them. When portraying characters without glasses, he will simply not wear them. This is because, according to his belief, actors are able to portray characters by only using their movements. And even without glasses, he would be able to make their general movements.

He is normally a fairly laid-back guy who only cleans himself up before a performance. He is similarly disinterested in his studies, admitting to have never even bothered learning how to read kanji.

However, when acting, his demeanor completely changes as he thrusts himself into the character he’s playing as. His acting ability is also a source of pride for him, declaring that no performance in the stage play adaption of Tokyo Blade will outshine his own.

Although he was in a loving relationship with his girlfriend, Akemi Himeno, a beautiful and charming fashion model, social media influencer and actress, Taiki is a womanizer who loves to engage and hooking up with women for pleasures, but unlike Sakuya Kamoshida, who has no qualms pursuing underage girls in public, Taiki only interacts with age-appropriate women in strict membership-only hangout facilities concealed from the eyes of the press and public as part of his own code and conducts and even tells Aqua that he is even self-conscious about it as it reminds of his father.

Relationships

Seijurou Uehara and Airi Himekawa

Taiki does not remember much about his father, since he was still young at the time of his father's death. However, the fact that he operates under his mother's surname implies that he holds him in contempt, not wanting to be associated with a murderer. His opinion of him seems to have only fallen lower upon learning that he has a half-brother, believing that his father had other children behind his mother's back. What Taiki does not realize, however, is that it was actually the other way around: his mother cheated on his father, which is what prompted him to kill them both.

It is not until he is hired to take part in The 15 Year Lie that Taiki finally learns the truth regarding his parents' murder-suicide. Also, the fact that he agrees to play his father in the movie implies that he sees him in a new light now.

Taiki does not remember much about his mother, since he was still young at the time of her death. However, the fact that he operates under her family name (Himekawa) implies that he prefers her over his murderous legal father. On the other hand, he is not aware that his mother was a child molester who conceived him when cheating on her husband with an 11-year-old boy.

Taiki finally learns the truth about his mother when he is hired to act in The 15 Year Lie, which autobiographies her crimes. This seems to have caused his views toward her to change drastically, with his primary motivation for performing in the movie being to make peace with her crimes. While understanding that she was likely molested herself when she was younger, Taiki claims that his mother was responsible for her own actions.

Aqua and Ruby Hoshino

Aqua is Taiki's younger half-brother. He first meets him during the rehearsals for the Tokyo Blade stage play, where they have several interactions. Taiki has also chastised Aqua over his love triangle with Akane Kurokawa and Kana Arima, telling him to just make a choice already.

However, they do not interact seriously until Aqua has discovered through DNA analysis that he and Taiki share the same biological father. Upon showing him proof of their blood connection, Aqua coerces Taiki into telling him everything he knows about their father. However, since Taiki does not know that he is the product of an affair, he ends up setting Aqua on a false lead by revealing that his father, Seijuro Uehara, was already deceased. After finding out the truth, Taiki and Aqua's relationship has grown as they start acting like typical siblings with Taiki calling Aqua little bro, knowing that it would annoys Aqua.

Upon learning of Aqua's death, Taiki was devastated as he attended his half-brother's funeral.

When Taiki learns that Aqua Hoshino was his half-brother, he likely realizes that he has a half-sister in Ruby. They have since worked together during The 15 Year Lie but none of their off-screen interaction have been shown. However, after screening was finished and the actors all went to the beach to celebrate, Taiki peeked at Ruby in her swinsuit, causing Melt to call him out for staring at his relative but he claimed to not care.

Cool, calm, collected, slightly mature and experience yet laid-back, friendly, flirtatious, confident yet very efficient in his acting skills, has a steady composure, reserved, charming, somewhat perceptive towards the people around him, has little tolerance towards people who would endanger or hurt them, caring and empathetic, patient and tolerant to those who are suffering or have lost a loved one, has a depressing worldview for having witnessed not only the murder-suicide of his parents but also the deaths of seven fellow actors and actresses, including her half-brother Aqua Hoshino, depressed, pessimistic, has suicidal thoughts