Mitsuteru Sakaki

Sakaki is a tall teenager with long black hair (green in the anime), tied in a ponytail, with long bangs. His eyes are constantly squinting unless he's very serious, shocked, or surprised about something. Sakaki is a man of few words, and is a no-nonsense guy when he fights: his blows are to the point, and he doesn't engage in banter. He seems to be friends with Shinjo. While examining Kunieda he whispered "Moe..." and "Tsundere girl" implying he might be an otaku.