Shinichiro Sano. 16 years old (10th grade), 182cm. Though he is a weak fighter, he possesses overwhelming popularity and charisma. He is the compassionate Leader of the first generation Black Dragon. Manjiro's older brother. A doting brother. No matter how much he is punched or kicked, he never stays down. He is weak to women and falls in love easily. His beloved bike is a HONDA CB250T (nicknamed Babu). He is skilled with his hands and excels at customizing bikes; his riding technique is top-tier. Waka calls him Shin-chan. He wears a pompadour when he's not at home.

Takeomi Akashi. 15 years old (10th grade), 183cm. Calm and intellectual. He is the Vice-Leader of the first generation Black Dragon who supports Shinichiro with his strategist mindset. He is Shinichiro's childhood friend and Haruchiyo's older brother; because he cares so much, he often ends up shouting in anger. He is known by the nickname God of War. His beloved bike is a KAWASAKI Z400FX. His riding technique is poor, barely at a level where he doesn't crash.

Wakasa Imaushi. 16 years old (10th grade), 160cm. Aloof and cool, but a battle-crazed fighter whose skills are world-class. He is the Special Attack Guard Lead of the first generation Black Dragon and one of its strongest members. Formerly the leader of a gang called Kodo Rengo, he was known as the White Leopard. Back then, he and Benkei were rivals and enemies, but now they are partners. His beloved bike is a SUZUKI GSX250E (nicknamed Goki). His riding technique is the second best after Shinichiro's.

Keizo Arashi. 16 years old (10th grade), 188cm. A boisterous and powerful brawler. He is the Elite Guard Captain of the first generation Black Dragon. He looks intimidating but is deeply loyal. Formerly the leader of a gang called Ragnarok, he was known by the nickname Benkei. Back then, he and Waka were rivals and enemies, but now they are partners. His beloved bike is a KAWASAKI Z1. His riding technique is average.

Manjiro Sano. 6 years old (1st grade), 140cm. Innocent and free-spirited, but has been competitive and exceptionally athletic since he was very young. He is Shinichiro's younger brother and calls him by his name without honorifics. He wonders, "Why is Shinichiro the leader when he's weak at fighting and weak with girls?" He hates weaklings and thinks crying equals being weak. He knows a lot of dirty jokes and acts like a little brat.

Keisuke Baji. 6 years old (1st grade), 140cm. Mischievous and full of curiosity. He has a strong sense of justice and deeply values his friends. He is Manjiro's childhood friend. He respects Shinichiro. Manjiro and Haruchiyo call him Baji.

Haruchiyo Akashi. 7 years old (1st grade), 140cm. Takeomi's younger brother, whom he calls Take-nii. While he is sensitive and delicate, he also has a strong-willed and competitive side. He admires Manjiro and Baji and hangs out with them. He senses Takeomi's love but finds him scary.

4 years old, 104cm. Active, bright, and tomboyish. She loves playing with the boys and is a girl who knows no fear. While she looks up to her older brothers, she has a strong sense of independence. She admires Manjiro and refers to herself using masculine or neutral pronouns like Ore or Jibun.