Momo is a white cat with pink ears and paws, living with her owner Emi Hanasaki at a café called Café Tulip. She is a sweet and ladylike cat, known for her gentle and graceful demeanor. Momo is one of the central characters of the Tama and Friends series, and she is often regarded as the "idol" or "cutie" of Third Street due to her charming and endearing nature. She wears a bell with a red ribbon around her neck, a gift from her mother that she cherishes deeply. This bell is a recurring symbol of her bond with her family and appears in episodes focused on her past, such as the aptly titled “Momo’s Bell.”

In the group, Momo is the only female cat during the original OVA series, and her youthful, freckle-like facial markings emphasize her position as the youngest member of Tama’s circle. Her personality is consistently portrayed as kind, polite, and a little shy, but she is also capable of standing up for herself when necessary. She shares a close friendship with Tama, who harbors a secret crush on her, and she is also a target of affection from the bulldog Bull. Her owner Emi is a kind girl who runs the café with her mother, and Momo is a beloved presence there.

Momo’s role in the story is to serve as a gentle and stabilising influence among the more energetic or mischievous characters. She often participates in the group’s adventures, but her presence is more subdued, providing a sense of warmth and domestic comfort. Her motivations revolve around maintaining her precious relationships, especially with Tama and Emi, and protecting the sentimental value of her bell. While she experiences some development through episodes that explore her past or her feelings, her character remains consistent as a sweet, ladylike cat who brings a soft, feminine energy to the group. She has no special abilities beyond her natural charm and the emotional significance of her bell.