Batako-san works alongside Uncle Jam at his bakery, baking bread and crafting sweets. She skillfully stitches and sews, often mending the torn capes of Anpanman and other heroes. She also replaces Anpanman's head when it is damaged or when he gives parts away to feed the hungry.

Having witnessed Anpanman's birth, she helped Uncle Jam raise him, forging a close, familial bond that gives her a supportive, almost parental role in his life. She shares a special connection with Cheese, the bakery dog she named; she understands his barks, and they work together with Uncle Jam on deliveries.

Batako-san radiates cheerful optimism, kindness, and consistent politeness. She diligently handles everything from baking and cleaning to laundry and deliveries, usually maintaining composure though occasionally forgetful. Initial concepts envisioned her as an infant found in the woods by a young Anpanman, but the finalized story established her as older than him.

Her relationships with Shokupanman (Bread Head Man) and Currypanman are friendly but less prominent. Past narrative elements implied a long-distance connection with Omusubiman, unexplored in later stories. Physically, she has round cheeks touched with pink, black eyes, a button nose, and spiky black hair typically hidden under her chef's hat. She wears blue overalls over a white vest. As a human-like being, her existence is unique in a world otherwise devoid of humans.