Manabu Okawa, also known as Arthur in some regions, is a Japanese football player associated with Nankatsu Elementary School and later Nankatsu Middle School, primarily playing as a midfielder or defender. He competed in Nankatsu Elementary's football activities, standing 133 cm tall and weighing 28 kg. While he participated in friendly matches, specific on-field contributions are not detailed. Upon advancing to Nankatsu Middle School, his role changed significantly; he did not appear in tournament matches, transitioning instead to a bench supporter and data analyst for the team, measuring 154 cm and 43 kg. After his playing career concluded, he discontinued active football and joined "Team Tsubasa," dedicating himself to supporting Tsubasa Ozora's personal training and rehabilitation. His birthday is March 2, his blood type is A. Early manga editions initially named him Masaru Okawa, revised to Manabu in Volume 3, with some adaptations temporarily retaining the earlier name.