Kaiyuu Hiyama (檜山界雄 Hiyama Kaiyuu ) is a first year high school student and plays the timpani . He dropped out of school for at least a year before returning.
Kaiyuu is a lean, slightly tall teenage boy with straight grayish-brown hair tied in a pony tail and lazy-looking brown eyes, he has a strand sticking out in the back. He is usually seen slumped over a bit and holding red timpani mallets. His signature outfit is his green sweater over his school uniform.
Kaiyuu is laid-back all of the time, but he is not lazy. He tends to bring up good points in cases, as he is described as intellectual by Haruta during a case.
|First Year Students||Akari Gotō • Kaiyuu Hiyama|
|Second Year Students||Haruta Kamijou • Chika Homura • Naoko Serizawa • Misato Asou • Yaeko Fujima • Nagoe Shunya|
|Third Year Students||Miyoko Narushima • Keisuke Katagiri • Kae Asahina • Sae Asahina • Maren Sei • Hinohara Shuuichi|