Affiliation: Yanioka High School Grade: 3rd Year Birthday: June 4th Blood Type: B The playful boss of Yanioka High. He has a short fuse and an unpredictable personality. Despite his appearance, he possesses strength on par with Kunio and is feared by those around him because he genuinely enjoys fighting. He is a master of staff techniques, earning him the nickname "The Staff User" because he is unstoppable once he has something rod-like in his hands. He likes rice crackers.

Affiliation: Hanazono High School Grade: 3rd Year Birthday: May 5th Blood Type: O Kunio's rival. In the past, after his club teammates were attacked one after another, he raided the enemy's headquarters alone. This incident led to his expulsion from the club and caused him to repeat a year. He was once bitter, but meeting and fighting Kunio woke him up. Now, he is a reliable boss who keeps the Hanazono gang together.

Affiliation: Nekketsu High School Grade: 3rd Year Birthday: November 27th Blood Type: AB A delinquent for justice who excels at everything from fighting to all kinds of sports. He has a weakness for girls but is deeply trusted by others. He possesses a hot-blooded spirit, willing to risk his life for his friends. His catchphrase is "Don't mess with me!"

Affiliation: Horyo High School Grade: 3rd Year Birthday: May 3rd Blood Type: A A charismatic student whom everyone admires. He became strong naturally while protecting his younger sister during his childhood, but he is actually a very serious and polite young man. Or is he? He cannot ignore people in trouble and is kind to others without even realizing it, making him a "guilty" man whose fan base grows daily among both men and women.

Affiliation: Hakutaka Industrial High School Grade: 2nd Year Birthday: April 17th Blood Type: O The boss of Hakutaka Industrial High. He is a lazy attention-seeker who uses his heavy build for powerful attacks. However, his weakness is that he is fragile both mentally and physically. He hopes to one day get revenge on Kinoshita of Reiho, who defeated him in the past.

Affiliation: Kagemura Academy Grade: 3rd Year Birthday: May 25th Blood Type: O One of the bosses of Kagemura Academy. Ever since enrolling, he realized his school was ignored by those around them and has been trying to make a name for the academy. Perhaps because his efforts often backfire, he doesn't have many friends. He gets along well with the quiet Yamamoto, and before they knew it, the two started hanging out together.

Affiliation: Kagemura Academy Grade: 3rd Year Birthday: June 21st Blood Type: A One of the bosses of Kagemura Academy. He was always bad at fitting into social circles and spent a lot of time alone, but since becoming friends with Kamijo, the two are often seen together. He isn't interested in much besides making a name for himself, but he enjoys getting stronger by picking fights with various people alongside Kamijo.

Affiliation: Hakutaka Industrial High School Grade: 2nd Year Birthday: April 17th Blood Type: O The self-proclaimed number two of Hakutaka Industrial High. He constantly sticks to the boss, Nishimura, and has somehow been permitted to call himself the "second-in-command." While he lacks actual skill, he has plenty of guts and possesses a single-minded loyalty, continuing to follow Nishimura even after his defeat by Kinoshita.

Affiliation: Hanazono High School Grade: 2nd Year Birthday: October 15th Blood Type: A Riki's girlfriend. She has an innocent and cute personality, and her kindness in treating everyone without fear led to her dating Riki. She attended the same middle school as Kunio and Hasebe and is their junior. Her hobby is sewing, and she prefers cappuccinos over caffe lattes.

He always wears a terrifying expression. One of the Reiho Four Heavenly Kings. He is the definition of terror, ruthlessly finishing off opponents who have already admitted defeat and lost the will to fight. He is famous for his violent temper and lack of emotional control, but he is surprisingly well-liked by his subordinates. Those who have fought him often describe him as a zombie who keeps attacking no matter how many times he's hit.