Kyōka Fujii is a young adult woman with shoulder-length brown hair, typically styled in low twin braids, and bangs falling over her forehead. Her blue eyes are accentuated by pink-framed glasses.

She holds the position of club advisor for the Shin Koshigaya High School baseball club. Kyōka begins her involvement by observing the team's early practices and expressing satisfaction with their progress. Her practical support includes ordering new uniforms and arranging their first practice game. After the team loses that match, she organizes a training camp and secures two additional practice games to aid their development.

Her understanding of baseball comes from firsthand experience as a former member of the school's baseball club during its "golden age." This background enables her to contribute meaningfully to the girls' training, offering insights that help them refine their skills and strategies.