Akiko Kousaka

Akiko Kousaka stands as one of the most formidable junior female players within the South Tennis Club, ranking just below the club's top player, Natsuki Takasaki. Her tournament record speaks for itself — a top-four finish at the Kanagawa Junior Championship and a place among the top 32 at the All-Japan Junior Tournament. Despite appearing early in the story, her personal background remains largely unexplored, lending her an air of mystery that sets her apart as a quietly powerful and intriguing presence throughout the series.