Kyoko Nanbu is a supporting character in the 1977 live-action film "The Visitor in the Eye." She is a student and a member of the same university tennis club as the protagonist, Chiaki Komori, serving as Chiaki's regular doubles partner. Kyoko is cheerful, energetic, and a loyal friend. She is quick to welcome Chiaki back to the tennis court after Chiaki recovers from her eye surgery and encourages her to resume normal activities. As the story unfolds, Kyoko becomes increasingly concerned about Chiaki's well-being when Chiaki begins seeing a mysterious man that no one else can see. Kyoko accompanies Chiaki during investigations, offering emotional support and practical help. She is perceptive and brave, willing to follow Chiaki into uncertain situations. Her primary relationship is with Chiaki, and she acts as a steadfast confidante throughout the story. While Kyoko does not undergo a major personal transformation, her protective concern for Chiaki deepens as the mystery progresses. Her notable abilities include skill in tennis, particularly in doubles play, and a keen observational sense that aids Chiaki in confronting the truth. Kyoko's role is that of a grounding, supportive friend who helps bridge Chiaki's return to everyday life.