Shinichiro Sano. 16 years old (10th grade), 182cm. The leader of the First Generation Black Dragon who cares deeply for his friends. Though he is a weak fighter, he possesses overwhelming popularity and charisma. He is Manjiro's older brother and a total doting sibling. 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 good with his hands, so he excels at customizing bikes, and 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. 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 yelling 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 maniac with top-tier skills. The Attack Unit Captain of the First Generation Black Dragon and one of its strongest members. Formerly the leader of the Kodo Rengo gang, he was known as the White Leopard. Back then, he and Benkei were enemies and rivals, 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 dynamic and powerful fighter. The Guard Unit Captain of the First Generation Black Dragon. He looks scary but is deeply loyal. Formerly the leader of the Ragnarok gang, he was known by the nickname Benkei. Back then, he and Waka were enemies and rivals, 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 hated losing since he was very young and has excellent reflexes. 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 bad with girls?" He hates weaklings and equates crying with being weak. He knows a lot of dirty jokes and is quite precocious.

Keisuke Baji. 6 years old (1st grade), 140cm. Mischievous and full of curiosity. He has a strong sense of justice and a personality that treasures 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 has a sensitive and delicate side, he is also strong-willed and hates to lose. He admires Manjiro and Baji and hangs out with them. He recognizes Takeomi's affection but finds him scary.

4 years old, 104cm. An active, bright, and tomboyish girl. She loves playing with the boys and is fearless. While she looks up to her older brothers, she has a strong sense of independence. She admires Manjiro and uses masculine pronouns like 'ore' or 'jibun' for herself.