Volley-bu-chan, also known as Volleyball-chan, is the energetic captain of Ai-chan's high school volleyball team and her close friend. She possesses a tall build, brown hair styled in a messy, tomboyish ear-length cut, and distinctive pink eyes. Her figure is notably curvy, with the manga confirming an F-cup bust size. She is commonly seen in her school uniform or athletic gear like tracksuits and volleyball uniforms.

Bubbly and outgoing, she holds the status of the school's most popular girl. She is fiercely protective of Ai-chan but also harbors a strong, overt sexual attraction to her, frequently expressing it through unwanted groping of Ai-chan's breasts, much to Ai-chan's annoyance. This open queerness defines a key aspect of her character. Her special skill is volleyball, and she manages stress through running. When resisting urges, she prioritizes sleep over appetite or sexual desire, expressing no specific interest in men.

She is the niece of the Salaryman character, connecting her to the series' core narrative. Her background includes a birthdate of August 24th and blood type B. Madder is her favorite color, fillet meat her preferred food, and she spends her days off playing games. Academically, she shows no particular subject weaknesses.

She appears across multiple seasons and OVAs, featuring in Season 1 (Episodes 2, 5, 7, 10), Season 2 (Episodes 1, 7, 11, 12), Season 2 OVA 1, and Episode 26 depicting Maegami-chan's wedding.