Hajime Masatoki directs the badminton club for Mitsuhoshi Banking. He leads with strict discipline, demanding results and dismissing players who fall short. This approach resulted in Mikoto Shiratori's termination after a match loss. Masatoki himself was a skilled badminton player in his youth. His appearance features black eyes and neatly styled black hair showing signs of gray, contributing to a composed, professional demeanor. His blood type is A.