Mimi Sensei teaches a recurring class of young animal students at the elementary school. She consistently wears a yellow bow, red glasses, a blue frock, and blue shoes. Fulfilling a foundational community role, she emphasizes education and care for her pupils.

Debuting in the episode "Anpanman and Shokupanman" on October 17, 1988, she became one of the earliest recurring characters. Mimi Sensei maintains a regular presence throughout the anime series and appears in nearly every theatrical film.

She demonstrates a deeply protective "Mama Bear" instinct toward her students when they face threats or distress. She occasionally confronts antagonists like Baikinman directly, scolding him for misbehavior and employing stern glares to deter his actions. While sometimes requiring rescue, she also exhibits defiance and resilience against villains.

Her character evolved from minor cameos to greater prominence. Early episodes showed her in background or supporting roles, but later narratives increased her involvement, including participation in Anpanman’s heroic efforts. This development reflects a progression toward greater assertiveness and occasional heroism while maintaining her core educator role.

Her students include rabbit children Pyonkichi, Usako, and Usao. Narrative devices like building makeshift transportation for Anpanman highlight their cooperative dynamic. Personal quirks include difficulty with dancing, notably the tango, though she receives assistance from characters like Naganegiman to overcome this challenge.

Merchandise such as school-themed playsets and plush dolls reinforces her identity as an educator within the franchise’s broader commercial ecosystem.