Cheese, a dog living at Uncle Jam's bakery, was rescued as a starving puppy during Anpanman's early patrols. Anpanman offered part of his own head to feed Cheese, forging an unbreakable bond that cemented Cheese's place within the bakery's core group and made him Anpanman's devoted companion and pet.

He exhibits classic canine loyalty, frequently joining Anpanman on patrols. Cheese acts as a capable sidekick during rescue operations and confrontations with foes. Within the bakery, he contributes to the lively atmosphere, regularly interacting with Uncle Jam, Batako, and others. While primarily Anpanman's supporter, Cheese also spends time with characters like Melonpanna.

A defining aspect of Cheese's story is his romantic relationship with Rare Cheese-chan, Usako's pet rabbit. This confirmed romantic subplot, acknowledged within the series narrative, sets him apart as the only major character with such a storyline, adding a recurring dimension beyond his primary role.

Cheese remains a steadfastly supportive figure. He utilizes his inherent canine traits—loyalty and playful moments—to aid the heroes and participate in daily bakery life. His narrative contributions consistently stem from his established role as a companion animal, remaining unchanged without significant physical transformations or power developments. His actions perpetually echo themes of friendship and gratitude rooted in his rescue origin.