A 3rd-year student in Class 4 at Chiba Sohoku High School. He is close friends with Hajime Aoyagi. He attended Minami Junior High in Chiba City. He is a road racer and a member of the bicycle racing club. His position is a climber. He is 173cm tall and weighs 59kg. His birthday is September 11, 1991 (Virgo), and his blood type is A. His hobbies include karaoke and singing in the bath. His best subject is math (he competed in the prefectural abacus tournament in middle school). He is the captain of Sohoku, wearing bib number 5. He is characterized by his somewhat long, permed hair. Naruko calls him "Perm-senpai." In his early appearances, his hair was depicted as frizzy, but it later settled into waves. He has very stubborn natural curls; even if he tries to blow-dry it straight after a bath, it immediately reverts to its original state.

A 3rd-year student and vice-captain at Chiba Sohoku High School. He is in the same year as Teshima. He is a road racer and his position is a sprinter. He is 165cm tall and weighs 56kg. His birthday is February 24 (Pisces), and his blood type is AB. His talent is illustration (he received top marks in art during middle school). He wears bib number 4. He has brown hair with bangs long enough to cover one eye. His hair is blonde-ish and shoulder-length. He often has a deadpan expression. The eye covered by his hair isn't fixed to one side. Because he is extremely quiet and rarely speaks, Naruko calls him "Silent-senpai." He admits to being gloomy, and combined with his serious nature, his middle school classmates secretly called him "Majime" (Serious) instead of "Hajime."

A 2nd-year student in Class 2 at Chiba Sohoku High School. He is in the same year as Imaizumi and Naruko. He attended Kujukurishi Junior High. He is a road racer and a climber. He is 165cm tall and weighs 54kg. His birthday is March 7, 1993 (Pisces), and his blood type is O. He wears bib number 1. He has short hair, a small and slender build, and wears round glasses; because of his physique, he is often mistaken for a middle schooler (especially in plain clothes). He is uncomfortable with the aggressive, high-pressure atmosphere typical of athletic clubs. For this reason, he intended to never join a sports club (partly to avoid encountering people he perceived as scary or violent). Furthermore, his grades in PE are not very good. With few exceptions, he uses polite language (keigo) even with classmates and juniors, and even his internal thoughts are often formal. Initially, he struggled to revive the Anime and Manga Research Club, which was suspended due to a lack of members, but he ended up joining the bicycle racing club by chance and gradually began to show his talent.

A 2nd-year student in Class 3 at Chiba Sohoku High School. He attended Naniwa Sakai-hama Junior High. He is a road racer and an all-rounder (formerly a sprinter). He is 165cm tall and weighs 56kg. His birthday is August 29, 1992 (Virgo), and his blood type is B. He wears bib number 3. Known as the "Speedman of Naniwa," he is a talented racer who transferred to Sohoku from Osaka due to his father's job. He is a show-off who loves flashy things; everything he owns is red, and his hair is red too. He has a boisterous, impulsive personality and speaks in a thick Kansai dialect, but he is a deeply compassionate person who cares for his family and friends. However, he occasionally says or does something crude. He is constantly competing with his fellow second-year, Shunsuke Imaizumi. His laugh is "Ka-ka-ka!" He believes in luck and joined the club on a "Taian" (lucky) day. His creed is to stand out, and he pursues speed because he believes "the fastest person stands out the most." As a small-statured sprinter who excels on flat roads, he has put in more effort than anyone else. He once turned down an interview request during training camp, saying he couldn't meet his goals if he thought about unnecessary things, showing that he doesn't just want attention for anything—his goal is to stand out by winning races. He shares a rivalry and a mentor-student relationship with Jin Tadokoro as fellow sprinters, alternating between competitive fire and receiving advice. He also engages in eating battles with Hajime Aoyagi. He calls Onoda by his name with an honorific, but he gives nicknames to most other people. He calls his seniors "[Name]-senpai," Tadokoro "Old Man," Imaizumi "Sukashi" (Cool Guy), and his junior Issa Kaburagi "Kabu" or "Ikiri" (Cocky). He even calls Hakone Academy's Touichirou Izumida "Eyelash-kun."

A 2nd-year student in Class 2 at Chiba Sohoku High School. He attended Ichiba Third Junior High. He is a road racer and an all-rounder. He is 183cm tall and weighs 65kg. His birthday is May 18, 1992 (Taurus), and his blood type is A. He wears bib number 2. He has short hair with several stubborn cowlicks and sharp, cool eyes. He has a very stoic personality and is rarely moved by anything. Because of this attitude, Naruko calls him "Sukashi." He has known the manager, Miki Kanzaki, since childhood (they are childhood friends, but not in a romantic relationship). He is famous among the girls for being handsome. He is popular not only with his classmates but also with upperclassmen girls, who scream whenever he appears in public. He is an all-rounder who can perform regardless of the terrain. Because he is also a sore loser, he frequently bickers with Naruko, yet he deeply trusts Onoda, admitting (though he doesn't realize it) that he has been saved many times by Onoda's words and hard work.

A 1st-year student. He is a road racer and a sprinter (though he doesn't realize his own aptitude is that of a sprinter).