Taiki Himekawa/Relationships

Seijuurou Uehara
Taiki does not remember much about his father, since he was still young at the time of her 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 cheated on his mother. 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.

Hikaru Kamiki
Taiki's relationship with Hikaru is basically non-existent, as he remains unaware that he is an illegitimate child born when his mother allegedly molested the latter whilst he was only 11 years old.

Airi Himekawa
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 implies that he prefers her over his murderous legal father. On the other hand, he seems to be unaware that his mother was a presumed child molester who conceived him when cheating on her husband with an 11-year-old boy.

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

However, they did not seriously start interacting until Aqua discovered through DNA analysis that he and Taiki have the same biological father. Upon showing him proof of their blood connection, Aqua coerced Taiki to tell him everything he knew about their father. However, since Taiki did not know that he was the product of an affair, he ended up setting Aqua on a false lead by revealing that his father, Seijuurou Uehara, was already deceased.

Ruby Hoshino
When Taiki learned that Aqua was his half-brother, he likely realized that Ruby was his half-sister. However, so far, the two have not interacted.

Toshirou Kindaichi
Toshirou is some what of a father figure to Taiki as he was the one who had looked after him following his the death of his parents.