Michiya Kuon is the head coach of Inazuma Japan, the national team that competes in the Football Frontier International tournament. He is also the foster father of Fuyuka, whom he took in and raised after her parents died, leading her to call him "oto-san" despite the lack of a biological relationship. Kuon first appears as a mysterious and reserved figure, often observing players from a distance and evaluating their capabilities with a logical, level-headed demeanor. He is highly focused and serious, maintaining a strict and rigorous coaching style that initially distances him from the players; his training methods sometimes seem unusual or odd to the team, but they consistently prove effective in improving performance and unlocking new techniques.

His primary motivation is to guide Inazuma Japan to victory against increasingly powerful international opponents, but he also carries a deep sense of responsibility for the wellbeing of those under his care. This inner conflict surfaces in moments of doubt, particularly regarding past decisions made to protect Fuyuka, which leaves him questioning whether his actions were truly right. Throughout the series, Kuon serves as a key strategist, devising tactical solutions such as the deployment of three goalkeepers—a move inspired by the parable of three arrows—which helps the team develop the Asura hissatsu technique to counter formidable shots. His relationship with the players evolves as he learns to trust their instincts and growth, especially during high-stakes matches where his calm guidance becomes indispensable.

Notable abilities include sharp tactical acumen, the capacity to design unconventional training regimens that yield tangible results, and the psychological insight to challenge players in ways that push them beyond their limits. While initially emotionally distant, his development is marked by a gradual opening up and a greater willingness to believe in the team’s collective strength.