Chako emerges as a Cocotama, a diminutive deity born from a teacup faithfully used by the human Haruka Hoshinogawa. Identified as female and revered as the "Cup Goddess," she bears the full ceremonial title "Cha Cha Cha Gokuto Itakadakimasu no Mikoto." Visually, she possesses yellow cat-like attributes, her paws adorned with gold markings, large green eyes framed by small lashes, light pink cheeks, and a touch of flared hair. Her attire includes a white chef hat featuring an orange flower and eggshell-style pants decorated with two green flowers.

Her personality blends shyness with a typically soft-spoken nature, though she can lash out when significantly disturbed. A defining characteristic is her substantial appetite; Chako is a confirmed big eater with a deep fondness for drinking tea, a trait that fuels comedic outbursts, especially when food she anticipated is taken by others. Her magical abilities manifest exclusively around food, echoing her origin from a teacup.

Initially residing with Haruka and fellow Cocotama, Chako later embraces a role as a waitress at Pantonio's restaurant, utilizing her food magic in service. However, her overeating habit challenges this role, sometimes interfering with duties like consuming portions of food orders meant for delivery before they reach customers.

Specific moments crystallize her traits: an intense food focus leading to conflict when Pillow takes candy she coveted, and a habitual tendency to eat parts of meals she is tasked with delivering, demonstrating how her appetite persists even when restraint is required. No concrete information details her appearance or role in other official media extensions like movies, OVAs, or the spin-off "Mono no Kamisama Cocotama."