Batako-san acts as Uncle Jam's primary assistant in the bakery. Her duties center on supporting the creation and upkeep of various bread-based characters. She is specifically responsible for crafting, repairing, and maintaining the special flying capes worn by Anpanman and other heroes, vital for their flight abilities; damage to these capes prevents flight until Batako-san fixes them.

She also assists in replacing Anpanman's head whenever it becomes damaged, dirty, or depleted from feeding others, a critical process for restoring his strength and powers. Her Japanese name directly translates to "Butter Girl," signifying her connection to bakery work.

A recognized trait is her occasional forgetfulness, which can affect her tasks. Nevertheless, she remains dedicated and hardworking within the bakery setting.

Within *Soreike! Anpanman: Inochi no Hoshi no Dolly*, Batako-san performs her established support role alongside Uncle Jam at the bakery. Her portrayal in this film aligns consistently with her functions across the broader franchise.