Batako-san assists Uncle Jam in his bakery, participating in baking and maintaining operations through cleaning, laundry, and bread delivery. Her key responsibilities include replacing Anpanman's depleted head and mending his torn cape to restore his flight; this repair function also extends to other characters requiring functional flight capes.

Present during Anpanman's creation, she participated in his upbringing alongside Uncle Jam, establishing a familial connection and reflecting a supportive, nurturing role. She interacts regularly with the bakery dog, Cheese: she named him, advocated for his permanent residence, and often interprets his barking. Their activities include joint bread deliveries with Uncle Jam.

Her skills encompass baking, sewing, and dressmaking, demonstrated through repairing garments beyond hero capes, such as creating dresses. Her appearance features rosy cheeks, black eyes, a small round nose, and spiky black hair that shortens throughout the series. She typically wears blue overalls over a white vest and a chef's hat, which conceals a bowl-cut hairstyle when removed. Her human-like appearance exists in a world otherwise devoid of humans.

Her relationships include cooperative dynamics with Bread Head Man (Shokupanman) and Currypanman, though these lack extensive development. An early concept involved her discovery as an infant in the woods by a young Anpanman, but this backstory was discarded in favor of her current role as an older assistant present during Anpanman's origin.

Within "Soreike! Anpanman: Sukue! Kokorin to Kiseki no Hoshi," Batako-san appears among the involved characters. No unique narrative developments, interactions, or additional background specific to her role in this film are documented in the provided materials.