Rokurou Hirai (平井 六郎 Hirai Rokurō) is a second year shooting guard who plays for Shinjo Towa Academy. Everyone on the team calls him 'Roku.'
Roku is about 174 cm tall. He has medium-length black hair with corresponding eyes. During basketball matches and practice sessions, he wears a white color headband. His jersey number is 6.
Roku is an excellent shooting guard who can effectively score from the outside. He is an efficient defender, as he held off Kenji early on in the match against Kuzuryū High. At the end of the game, Roku made a steal from Momoharu right after the rebound, which gave Shinjo Towa Academy a chance to win the game.
- The name Rokurou means "six" (六) (roku) and "son" (郎) (rou).
- Rokurou's surname Hirai means "flat" (平) (hira) and "well, mine shaft, pit" (井) (i).