A cheese tabby cat dreaming of world domination. Gender: Female A cat who dreams of driving out humans and conquering the Earth. She has a cranky, bold, and self-centered personality, and will stop at nothing to achieve her goal of world conquest. She is full of confidence, believing that humans live in fear of cats.

A wild hamster resembling a glutinous rice cake, 'Caesar Kang Tae-sik'. Gender: Male A wild hamster living a fierce, hard-boiled life in a tiny body. His self-chosen name is Caesar Kang Tae-sik, but he is called Kasik for short. Contrary to his cute appearance, he has a cynical and tough personality, and he hates being told he looks like a rice cake.

A stray dog who loves making comrades, 'Morang'. A stray dog who enjoys being loved by humans and loves humans dearly. Gender: Female A possessor of an innocent, bright, and kind personality who loves friends and cherishes her comrades. She is simple and cheerful, but has a side that pushes through to the end once she sets her mind on something.

'Nabi', who can read human writing. Gender: Male A pet cat living with an elderly human couple. Accustomed to living with humans, he can even read human script, providing various forms of help to Chichi's group. He is knowledgeable, well-informed, and a relatively sensible cat. He has a strong lazy streak and dislikes stepping forward.

A cowardly cat who loves to meddle, 'Naerong'. A kitten who was born not long ago. Gender: Female She is very curious and likes to meddle in everything, but she is so cowardly that she is always trembling. She follows Nabi, who knows everything, very closely.

The alley boss of Wimun-dong, 'King'. Gender: Male The boss cat who leads the stray cats of Wimun-dong. Like a leader, he is decisive, has great initiative, and is a loyal cat. He is a pure-hearted cat who fell for Chichi and wants to give her his everything.

The police station cat protecting the peace of the neighborhood, 'Pippo'. Gender: Male A cat cared for by the local police station. He values principles and rules, and is in a hostile relationship with King, the neighborhood boss. He does not tolerate animals that mess up the neighborhood and goes on patrols.