Naoto Tachibana

At some point in Naoto's childhood he was bullied by some kids, however Takemichi Hanagaki managed to chase them away. Takemichi advised Naoto to be more confident and not back down. Knowing that Naoto is Hinata's younger brother, Takemichi told him to take care of his sister. On the same day, Takemichi revealed to him that on July 1st, 2017, Hinata and Naoto would die, so he told him that he should remember this date and protect his sister. Naoto took this seriously and shook Takemichi's hand. You and he are colleagues and both work as detectives in the Tokyo Criminal Bureau