Name: Keisuke Baji Gender: Male 4th grader (10 years old) Strong fighter. Childhood friends with Manjiro; they practice karate together. Black hair.

Name: Manjiro Sano Gender: Male 4th grader (10 years old) Incredibly strong fighter, especially with kicks. Close childhood friends with Baji (they do karate together). Precocious, occasionally makes dirty jokes. Blonde hair. Shinichiro is his older brother.

Name: Haruchiyo Akashi Gender: Male 4th grader (10 years old) Has long eyelashes. Pink hair. Takeomi is his older brother, and Senju is his younger sister. He is constantly scolded by Takeomi because Senju often causes trouble. He wants to become strong like Mikey and Baji so he can stand up to Takeomi.

Name: Senju Akashi Gender: Female 3rd grader (9 years old) Female, but refers to herself as 'Ore' or 'Jibun'. Pink hair. Long eyelashes. Takeomi and Haruchiyo are her older brothers. Often causes incidents. Sometimes blames things on Haruchiyo.

Name: Takeomi Akashi Age: 19 Vice-President of the delinquent group Black Dragon. Older brother to Senju and Haruchiyo. Scolds Haruchiyo whenever Senju uses foul language or causes trouble. Frequent smoker.

Name: Shinichiro Sano Gender: Male Age: 20 Founder and First President of the motorcycle gang Black Dragon. Weak in a fight, but kind and devoted to his friends, making him a reliable leader in a crisis. Admired by everyone. Mikey's biological older brother.