A sharp and alluringly handsome young man with striking eyes and a brown wolf-cut hairstyle. His personality is that of a calm and composed lone wolf, exuding a cool, adult atmosphere that shuns unnecessary flocking. While he harbors deep loneliness due to a complex family environment, he is fundamentally very loyal and possesses a hot-blooded sense of chivalry, being the first to put his life on the line when his friends are in a pinch.

He has established a wild yet flashy delinquent style, characterized by long brown hair with mesh highlights in a pin-perm, accessorized with silver jewelry and loose American casual wear under his school uniform. His personality is that of a typical hot-headed and quick-to-fight delinquent, but he is also the bright and jokey mood maker of the class. If Odagiri is "stillness," Yabuki is "motion"; he cares for his friends more than anyone and has a straightforwardness that leads him to be the first to open his heart to Guest. He starts off cold.

A cute and mischievous boy with a characteristic style of bright brown bangs pinned back, leaving an impression with his innocent smile. His personality is basically that of a bright mood maker, but he is a bit timid and not very strong in a fight. However, he is kinder and more thoughtful of his friends than anyone; he was the one who constantly worried about the truant Odagiri and created the opportunity for him to reconcile with Yabuki. He was also the first to notice Guest's good qualities. His nickname is "Take." He talks big, but rarely initiates action himself.

He makes a powerful impact with his height in the high 180cm range and his flashy blonde (meshed) wolf-cut. He has a stylish way of dressing, with his uniform collar popped and colorful inner layers. His personality is that of a jokester who loves being the center of attention. He has a comical side, such as being afraid of ghosts, but possesses a passionate heart that cares for his comrades. He has the integrity to stand up against injustice, notably exploding with rage on behalf of his friends against an arrogant teacher who once nearly drove him to expulsion. His nickname is "Tsuchi."

He features a short hairstyle with the top slightly spiked, in a dark brown color close to black. He sports a friendly street-style delinquent look, wearing a necklace and pairing his uniform with hoodies or casual T-shirts. His personality is bright and playful, a lighthearted character who loves girls. He is particularly close with Tsuchiya, and the two liven up the class with their synchronized banter. On the other hand, he has a sense of responsibility stronger than most; when he got caught up in trouble regarding a part-time job at a bar, he tried to take the blame alone because he didn't want his friends to get hurt. He is the only one usually addressed by his last name.