Masamune Shichigahama is a third-year student and the captain of the Ao High School boys' rhythmic gymnastics club in the anime Backflip!!. He hails from Miyagi Prefecture and comes from a family that runs a long-established sasa kamaboko, a traditional fish cake specialty shop. His initial inspiration for the sport came when he happened upon Shuusaku Shida performing a backflip in a park, a moment that moved him deeply and led him to invite his childhood friends Keisuke Tsukidate and Nagayoshi Onagawa to start practicing rhythmic gymnastics together, eventually forming the core of the club. As captain, Masamune possesses an exceptionally strong passion for rhythmic gymnastics and a deep sense of responsibility toward the club, with his feelings for the team being second to none. He is characterized by a passionate, responsible, and proactive personality, often taking the lead in organizing the team's direction and maintaining order. While he values discipline and the stability of the group, he also learns over time to balance the need for synchronization with trust in each member's individual strengths. He is a childhood friend of both Keisuke Tsukidate and Nagayoshi Onagawa, having grown up with them in the same area, and their long history together provides a foundation of trust within the team. As the captain, he guides newer members like Shotaro Futaba and Ryoya Misato, helping them integrate into the team's dynamic. His leadership is characterized by a focus on responsibility and a determination to bring the team together to compete at the Inter-High tournament. In terms of abilities, he is a technically strong and experienced gymnast whose movements carry a distinct power and stability, reflecting his role as the team's anchor. His dedication to the sport and his teammates is unwavering, and his growth involves learning to rely on the unique talents of each member to elevate the group as a whole.