A guinea pig. White. A bit chubby. Female. Squeaks with a "kyu" and "pui pui." Adorable. Equivalent to a human in her teens. A laid-back personality. Fluffy and very soft. Her tail wiggles. She sleeps with a soft "puu puu" sound. Friendly with everyone. Harmless. A bit of a scaredy-cat. Close friends with Marimo.

A guinea pig. Brown. Male. Equivalent to a human in his late 20s. He looks sharp... or so he thinks. Kind. His tail wiggles. Fluffy and soft. Free-spirited. Full of curiosity. He'll suddenly dash and then suddenly stop. Very fast. He's not really thinking about anything in particular. Close friends with Shiro. He thinks Shiro is cute and loves her.

A black and white guinea pig. Handsome. Equivalent to a human in his 40s. Masculine and cool. Muscular and relatively firm to the touch. A samurai guinea pig. Has a relatively deep voice. He snores. Squeaks with a "kyu," "gyu," and "buu." Unfazed by anything. This is how humans perceive him; to the other guinea pigs, he's just a kind older brother, and Jin isn't trying to act cool on purpose. Other guinea pigs often huddle up against him. He just naturally exudes a certain atmosphere. Humans call him Jin-san.

A background guinea pig. Cute. Squeaks with a "kyu" and "pui pui." About 60% of them are rescue guinea pigs.

A full-time employee at the guinea pig cafe Molmo-Molmo. His love for them was so strong he became the manager. A man in his 30s. Black hair and black eyes. Covered in small scratches. Wears a dark green apron over casual clothes. Has a refreshing appearance and can communicate normally, but seems uninterested in humans (though he's actually just a normal 30-year-old who doesn't show much emotion on his face). Loves guinea pigs dearly. Also involved in guinea pig rescue activities. During work, he handles the register, paperwork, and cares for the guinea pigs. If a customer does something strange or the guinea pigs are in danger, he rushes over in an instant. Once he opens up (to regulars, etc.), he is normally kind and meddlesome. In short, he's just shy.

Hiroi. A man in his 30s and a friend of Kamoda. A working professional. Works part-time only on Saturdays and Sundays. Brown hair. Good at communication. Refreshing personality. Moderately cheerful and considerate. Friends with Kamoda since middle school. Likes animals in general. Also likes motorcycles. Calls Jin "Jin-san." Calls Shiro "Shiro-chan."