Cherry-chan serves as one of the central seal figures within the Mamekawa family narrative, residing among their collection of miniature companions. She is a member of the Mamegoma species, typically measuring about 12 centimeters tall, allowing her to live comfortably in standard fishbowls often enhanced with ice cubes for cooling. Her design features a distinctive pink coloration, aligning with known variations across the Mamegoma character series.

Within the group dynamic, Cherry-chan shares her environment with fellow named seals: Mameta (the primary white seal), Soda-kun, Lemon-chan, and Candy-chan. This collective engages in typical domestic life, inhabiting adapted spaces such as hamster cages or bathtubs. Cherry-chan embodies the core traits common to her species: an omnivorous diet favoring edamame beans, expressive emotional displays balancing limited cognitive capacity, basic understanding of human speech, and low physical activity levels frequently expressed through extended rest periods.

Her portrayal remains consistent across all media. Cherry-chan features prominently in the group-oriented anime "Kupu~!! Mamegoma!", which emphasizes communal interactions. A character song, "Cherry Cake" (Cherry-chan no Uta), appears on the anime soundtrack. Video game adaptations, including Nintendo DS titles "Mamegoma: Honobono Nikki" and "Mamegoma 3: Kawaii ga Ippai!", present standardized seal behaviors. Official merchandise and print media, like picture books, maintain this uniform depiction without introducing unique background elements or personal development across seasons, films, OVAs, or spin-offs.