Kazuki Nagai

Originally Nagai disliked Shinichi, but after Shinichi intervened while he was being jumped by Mitsuo's gang, he changed his demeanor. Nagai is quick to jump into situations as seen when he got in Shimada's face for confronting Shinichi.

Nagai has spiky brown hair that is shorter on the sides than the top. He is often seen wearing his school uniform. In the manga he has slicked-back black hair and a more angular face.