Kyōko Naraku is a female satyr and one of the main characters in the series A Centaur's Life. She has golden hair, two long ears, horns, and a donkey tail. Her eyes are almost always closed, giving her a perpetually calm or serene expression. She typically wears a black school uniform with a blue tie and brown shoes. As a student, she attends school alongside the other main characters.

Her personality is marked by a cool and composed demeanor. She tends to be blunt in her speech and does not sugarcoat her opinions, but she is also knowledgeable and well-read, often offering insightful observations. Despite her outward confidence, she harbors a hint of anxiety beneath the surface, suggesting an underlying sensitivity. Her motivations are not heavily detailed, but she generally acts out of a sense of responsibility to her friends and a desire to understand the world around her. In the story, she serves as a grounded, sometimes pragmatic counterpoint to her more whimsical classmates. She is part of the central friend group that navigates everyday life in a world populated by various mythological creatures.

Key relationships include her close friendship with Himeno Kimihara and Manami Mitama, with whom she shares many daily experiences and occasional supernatural adventures. Her development is subtle, centering on gradually opening up emotionally and learning to rely on others despite her independent nature. One of her notable abilities is exceptional archery skill; she is shown non-lethally taking down fifty medieval fighters with her bow and arrows, as well as an unexpected talent for running along walls. These abilities come to the fore during a historical reenactment event, where her combat prowess astonishes onlookers. Overall, Kyōko Naraku is a steady, capable, and slightly introverted presence whose quiet strength and occasional vulnerability make her a memorable member of the ensemble.