Nanpei Aoba is a third-year student at Kakyoin High School and a member of the school's Stride club, where he serves as a runner and also as the team captain. He assumed the captaincy because he was the only returning member from the previous year's team, a position that highlights his experience and leadership within the club. Aoba is known for his strengths in blocking and endurance, making him a reliable and steady presence during relay races. His playing style focuses on maintaining position and withstanding pressure from opponents, which complements the overall strategy of his team. Aoba is described as very honest and possessing a strong competitive spirit, traits that align with the determined mindset of the Kakyoin Stride team members. He has short black hair and black eyes, stands 187 centimeters tall, and weighs 75 kilograms. His birthday is November 11, and his blood type is O. As a senior and captain, he plays a key role in guiding and organizing the team during competitions, though detailed information about his personal motivations, key relationships, or character development is limited in available sources.