Batako-san works as Uncle Jam's primary bakery assistant, supporting bread character creation and maintaining functional elements of the heroes' attire. She is diligent and committed but prone to forgetfulness, occasionally disrupting her tasks.

Her name directly reflects butter ("bata"), symbolizing her integral role in the dairy-dependent bakery and the series' food-themed universe.

A core responsibility involves creating, repairing, and maintaining the distinctive flight-enabling capes worn by Anpanman and other heroes, underscoring her vital support for their missions.

Her interactions extend beyond the bakery. She bonds with characters like Little Wolf (Chibi Ookami) in the episode "Batako-san to Chibi Ookami," showcasing her caregiving side. She collaborates with Shiratama-san in "Shiratama-san to Batako-san," illustrating her cooperative nature in community activities.

Character focus appears in dedicated episodes like "Batako-san no Tanjo hi" (Batako-san's Birthday) from the "Pikapika Collection" DVD, exploring her personal significance within the narrative.