Mrs. Kobayashi is a secondary human character in the anime What's Michael?, predominantly appearing as one of the many owners of the orange tabby cat Michael across the series' episodic stories. She is a middle-aged woman who lives in an apartment complex with her husband, Makoto Kobayashi, and their beloved pet cat, Michael. Her background suggests she is a homemaker or otherwise occupied with domestic life, as her daily routines frequently revolve around household tasks and caring for Michael.

In terms of personality, Mrs. Kobayashi is portrayed as kind-hearted and nurturing, especially toward Michael, whom she dotes on with constant affection and attention. She is deeply concerned about his health and safety, often worrying over his antics and trying to keep him out of trouble. At the same time, she exhibits a practical, no-nonsense side: she tends to prioritize cleanliness, order, and responsibility in her home, and is sometimes seen correcting the behavior of others when things get messy or chaotic. This perfectionist streak can lead to mild frustration when Michael or other characters disrupt her sense of order, but her intentions are always rooted in care and a desire for a harmonious household.

Mrs. Kobayashi’s primary motivation is the well-being of her family and especially her cat. She wants Michael to be happy and well cared for, and she takes pride in maintaining a tidy and organized home. Her role in the story is that of a typical pet owner who serves as a foil to Michael’s mischievous and unpredictable nature; her reactions to his antics provide much of the humor in the episodes she appears in. She interacts regularly with her husband, Makoto, and the other residents of the apartment complex, but her strongest bond is clearly with Michael. She is shown to be independent and capable, able to handle the challenges that come with living with a troublesome cat, and she often takes charge of domestic situations.

Because What's Michael? is an episodic series with no continuous narrative, Mrs. Kobayashi does not undergo significant development or change over time. Each episode presents a self-contained situation, and she remains a consistent figure: a loving, slightly perfectionist cat owner who combines maternal warmth with a practical approach to life. Her notable abilities include her keen attention to detail around the house, her persistence in trying to manage Michael’s behavior, and her ability to quickly adapt to the absurd situations that Michael’s feline logic creates.