Hibari Torii, also known as Eguchi in live-action adaptations, served as matriarch of the dissolved Torii Group yakuza clan. Following the group's disbandment, she secured employment at a grocery store to ensure stable livelihoods for her former members, deliberately preventing their joblessness. Transitioning from receiving service as a leader to providing customer service challenged her, yet she preserved her dignified grace despite visible fluster during errors. Her authority commanded universal respect, including from the formidable ex-yakuza Tatsu, who acknowledged her influence and reputation.

Physically, Hibari displays traditional aesthetics with brown hair typically pinned back, brown eyes enhanced by thick lashes, and manicured nails. She favors classic red lip tint and dons a dark maroon kimono featuring floral or plant motifs on sleeves and hem, secured with a purple obi sash. Her character harbors a passion for cats, expressed through secretive cat café visits dramatized like covert affairs. This devotion extended to crafting a needle-felted cat model—an attempt she abandoned in failure, later salvaged by Tatsu despite his unfamiliarity with the craft.

Adaptations diverge in depicting her background: the live-action series marries her to Tatsu's former boss Kikujiro Eguchi, weaving traits from her deceased manga-canon spouse into new subplots exploring their post-yakuza marriage. Narratives emphasize her civilian adaptation, contrasting mundane grocery work and neighborhood interactions with her underworld past for comedic effect. Her given name "Hibari" translates to "skylark," evoking freedom and song, while the surname "Torii" combines characters for "rooster" and "well" or "pit."