Batako-san serves as Uncle Jam's assistant in the bakery responsible for creating Anpanman and other characters. She is dedicated and hard-working in her support role for Uncle Jam's operations. Her specific responsibilities include creating and mending the capes worn by Anpanman and the other heroes. Her name translates directly to "Butter Girl," reflecting her association with baking ingredients. A noted aspect of her personality is her tendency to forget things, indicating occasional absentmindedness despite her diligent work ethic.