Kenroku Washizu is the highly-regarded head coach of Kunogi Academy's girls' soccer team, celebrated for leading them to victory in both the summer nationals and spring tournament. His intense, demanding methods, pushing players to their absolute limits and rejecting any hint of mediocrity, earned him the moniker "the Red Demon Who Doesn’t Cry." Yet beneath this strict exterior lies respect for authentic effort and talent, prompting sincere praise when deserved. His credentials are further solidified by his prior role coaching the Japan women's national team.

He shares a mentor-student bond with Naoko Nōmi, coach of Warabi Seinan High School, having coached her during her student years. Washizu acknowledges her dedication and offers guidance, including pivotal advice that helps her navigate professional uncertainty. Demonstrating his uncompromising standards, he instructed his Kunogi team to win a friendly match against Warabi Seinan by more than 10 goals without conceding. However, when Warabi Seinan's Nozomi Onda executed a skillful move during the game, Washizu immediately and publicly commended her ability, despite Kunogi's commanding lead.

After Kunogi Academy's decisive 21–0 victory, Washizu treated the opposing team with respect, acknowledging their fighting spirit and shaking hands as equals. He later engaged in a substantive discussion with Naoko Nōmi, advising her to shed pride and arrogance. He emphasized that a coach must dedicate all accumulated knowledge to their team while remaining open to learning from players, believing the role involves continuous mutual growth. His philosophy centers on relentless hard work and the profound responsibility inherent in coaching.