Batako-san assists Uncle Jam at the bakery, managing baking, cleaning, laundry, and bread deliveries. She possesses a bright, optimistic, kind, caring, and hardworking personality, rarely arguing. A key responsibility involves replacing Anpanman's damaged head and repairing torn capes for him and other heroes, utilizing her seamstress skills to create these items and other things like dresses.

She witnessed Anpanman's birth and helped raise him alongside Uncle Jam, providing a motherly figure sustained by regularly supplying new heads and mending his cape. She shares a close bond with Cheese, whom she named and advocated to keep; they often deliver bread together with Uncle Jam. She also interacts positively with Bread Head Man (Shokupanman) and Currypanman, though these relationships receive less narrative focus. An early concept envisioned her being found in the woods by a young Anpanman, but this backstory was discarded.

Her appearance includes rosy cheeks, black eyes, a small round nose, and spiky black hair that shortened during the show's run. She typically wears blue overalls over a white vest and a chef's hat covering her bangs, revealing a bowl cut when the hat is removed; she is taller than Uncle Jam. While she and Uncle Jam appear human-like, little to no humans exist in Anpanman's world.

In "Soreike! Anpanman: Tobe! Tobe! Chibigon", she appears as a character. Available information does not document significant evolution or changes in her character across seasons, movies, OVAs, or spin-offs.