Aragaki Kōichi's doubles partner is known for their high endurance due to growing up in hot climates. Although they lack proficiency in the "Shukuchihō" technique, this deficit is compensated by their exceptional lung capacity and stamina. In the manga, Shiranui possesses these qualities, while in the anime it's Aragaki who stands out for his endurance. Despite being from Kyuushu and Okinawa, where many players have dark skin tones, Shiranui was completely drained after their doubles match against Seigakus Kaido and Inui.