Chizu Kawabata is the best friend of Miyuu Aikawa, a fellow first-year high school student and fortune teller. Her physical appearance includes short black hair that is often styled into pigtails, and she wears a small dog pin as an accessory in her hair. This dog pin is a matching gift that symbolizes her friendship with Miyuu, who wears an identical one.

Described as having a generally positive personality, Chizu serves as a supportive figure in Miyuu's life. Her most significant role in the story is revealed through flashbacks that explore the foundation of Miyuu's career as a fortune teller. It was Chizu who encouraged her friend to use her fortune-telling abilities to bring happiness to others, providing the initial inspiration and motivation for Miyuu to pursue this path.

The tragedy surrounding Chizu is a central emotional driver for Miyuu's character arc. Chizu experiences a sudden disappearance and is suspected to have died, an event that plunges Miyuu into a deep depression that leaves her unable to leave her bed. This loss creates a profound sense of guilt in Miyuu, who blames herself for what happened to her best friend. However, in a key flashback scene, Chizu appears to reassure Miyuu, explicitly telling her that the incident was not her fault and encouraging her to continue her fortune-telling work and the mission of making people happy. This moment provides Miyuu with a measure of closure and the resolve to move forward.

Beyond her deep and defining bond with Miyuu, Chizu is suggested to have an affinity for birds, as she once sent a blurry image of one to her friend. Her role in the narrative is primarily that of a catalyst for another character's development, and her presence is felt most strongly through the impact of her loss and the lingering influence of her encouraging words.