Chiharu Wakamiya sports gingery strawberry blond hair styled in twin-tails, secured by vibrant pink and green block accessories, and possesses deep amber eyes. She radiates a strong enthusiasm for basketball and a fondness for cute things, while notably disliking mathematics. A degree of nervousness colors her interactions, especially around high school students, though she finds herself intrigued by their activities.

Her role as signboard girl places her at a deep-fried skewer shop adjacent to a card shop popular with high schoolers. This location buzzes as a gathering spot, fueling her curiosity about the older students' card games despite her initial middle school timidity. This job is integral to her identity, reflected in her "Go Go Stew's!" character card trait.

Within the "Go Go Stew's!" team alongside Yuu Higashiyama and Shuko Mino, Chiharu participates proactively. She contributes to group choices, such as advising Yuu to return ineffective "lucky" items after a tournament loss. In the card game, her abilities emphasize growth and coordination: her "[Spark]" ability fuels attack power based on cards in the retire area, and her "[Growing]" ability signals future potential. Her passion for basketball directly inspires card variants like "Basketball Girl, Chiharu," reinforcing this athletic interest as a core trait.