Kyoka Fujii is a young adult woman with shoulder-length brown hair tied in low twin braids and bangs falling over her forehead. Her blue eyes are framed by pink glasses. Her surname, Fujii, translates to "wisteria" and "well" or "mine shaft," while her given name, Kyouka, means "apricot" and "summer." She teaches at Shin Koshigaya High School and serves as the baseball team's club advisor.

Kyoka actively supports the team, ordering new uniforms and arranging their first practice game. After a loss, she organizes a Golden Week training camp and schedules two additional practice matches. During fielding drills, she hits sharp grounders toward the outfield, observing players like Ryo Kawasaki and Ibuki Kawaguchi struggle defensively. She designs specialized training, requiring Yomi Takeda, Ryo Kawasaki, and Sumire Fujita to perform 100 hip stretches daily to improve outfield mobility.

Her substantial baseball knowledge stems from playing during the school's "golden age," enabling relevant guidance during training. She evaluates pitching techniques, noting Ibuki Kawaguchi's unsuccessful attempt to copy another pitcher and Risa Fujiwara's capable fastball. Kyoka also monitors players' academic progress, stressing the need to pass midterm exams for club eligibility. Her leadership combines structured discipline with deep baseball understanding.