Batako-san functions as Uncle Jam's primary bakery assistant. She manages baking, cleaning, laundry, and bread delivery tasks. Her responsibilities include designing, creating, and mending the flight-enabling capes for Anpanman and other heroes. She also aids in replacing Anpanman's head when it loses strength due to dirt, water, or damage.

Physically, she stands taller than Uncle Jam, possessing rosy cheeks, black eyes, a small round nose, and spiky black hair that shortened during the show's progression. She typically wears blue overalls over a white vest and a chef's hat covering her bangs; removing the hat reveals a bowl cut hairstyle.

Her personality reflects kindness, politeness, and consistent diligence. She avoids arguments but shows occasional forgetfulness. Beyond baking, she demonstrates skilled seamstress abilities, stitching capes and crafting items like dresses.

Relationships define her role:
- She and Uncle Jam witnessed Anpanman's birth and raised him together as family. She provides maternal care through ongoing head replacements and cape repairs.
- She named the dog Cheese, advocated keeping him, and frequently translates his barks. They often deliver bread together alongside Uncle Jam.
- An early concept depicted her being discovered as a baby in the woods by a young Anpanman, though this backstory was replaced to establish her as older than Anpanman.

Regarding "Soreike! Anpanman: Happy no Daibōken," she appears as a character, performing her established bakery support and cape maintenance duties within the movie's context.