The owner of the beasts. He gets angry and annoyed quite easily. He is currently a university student. Gender: Male Age: 26

A romanticist cat who frequently says, "You son of a b*tch!" He calls Yoo Sumin his butler and Kim Hyunsik 'Hyunsik-hyung.' He addresses Saedaegal and Shumdyangi by their names, often mixing polite and casual speech. Gender: Male Age: 6

A Shiba Inu who rarely speaks and uses signs to communicate. He is Jung Jichan's original dog. He calls Yoo Sumin 'Hyung' and addresses the others by their names. He enjoys watching dog mating videos and playing League of Legends on Sumin's laptop. Gender: Male Age: 7

A neutered pigeon who frequently asks, "Who are you?" He is a simple-minded fool who loves fried chicken and has no brain. Gender: Neutered (Male) Age: 6

A lab rat who escaped from a laboratory. He calls Yoo Sumin 'Master' and adds '-ssi' to the names of the other animals. He is the cutest member and uses a unique polite speech pattern ending in '-shum' or '-gyang.' Gender: Male Age: 6

Kim Hyunsik's original owner and a university student. He is friends with Yoo Sumin. He has a troublesome personality, constantly asking Sumin to watch Hyunsik whenever he has an 'emergency,' promising to take him back once it's resolved. Gender: Male Age: 26

Yoo Sumin's girlfriend and a university student. She always uses polite speech with Sumin. She is raising Ttangttangi's family members, Carbonara I (mother) and Gopchang II (younger sister). Gender: Female Age: 21-22

A black Shiba Inu who came to Korea from Japan. He is the same age as the other animals and met them during their military service. They are now just friends. Gender: Male Age: 7

Yoo Sumin's paternal cousin. A 5th-grade elementary student who loves the Nintendo Switch and PS5. He has a romanticist personality. Gender: Male Age: 13

A parrot owned by Yoo Jaemmin. He is quite good at swearing and gets angry easily. He acts deceptively kind to gentle people while constantly trying to prank the other animals. Gender: Male Age: Unknown (Estimated to be the same age as Ttangttangi and the others)