Male. 8 years old. A crossbreed between a Korean Shorthair and a Singapura. He has a very foul mouth, no manners, and gray fur with only three black tabby stripes on his head. His tail is so short it looks like a deformity, but it's one of his charms. He has dot-like eyes and a petite frame. He loves fried chicken. He frequently says "You son of a b*tch!" He calls Yu Sumin his butler. He is the ugliest cat in the world. He has a terrible personality and is a very picky eater. He hates cat food, only eats Churu, and craves stimulating human food. He can't handle spicy food at all.

A yellow-furred Shiba Inu (dog) who communicates only through signs. Male. 8 years old. Although he's a Japanese breed, he's full of Korean pride. He loves fried chicken and is a realist. If he thinks something will benefit him, he just goes for it! He's a bit of a hypochondriac and spends a lot of time on Instagram and YouTube.

Male. 8 years old. A gray-feathered pigeon. His memory is non-existent; he can't even remember what happened 3 seconds ago. However, if you hit him hard on the head, his IQ increases insanely. He loves fried chicken.

Male. 8 years old. A white-furred mouse. He is the kindest among the animal friends, but he's so excessively nice that it's suspected he has 'Good Boy Syndrome.' When he gets angry, his muscle mass increases and he becomes huge. About once a year, he might suddenly snap and become rude. He calls Yu Sumin 'Master.'

Male. 27 years old. Works at a micro-enterprise called Cheonma Power Tech, which has only four employees. He has a very foul mouth and absolutely HATES the animal friends (especially Ddang-ddangi). He has only a single strand of yellow hair. He is Kim Daseul's boyfriend.

26 years old. Female. She wears glasses, but she becomes beautiful when she takes them off. She is the owner of Gopchang-i and Carbonara. She is extremely wealthy and a true animal lover.

Female. 14 years old. A white-furred mix of Korean Shorthair and Abyssinian. She is elegant with a long tail and blue eyes. She is Kim Daseul's pet cat and the biological mother of Ddang-ddangi and Gopchang-i.

Male. 3 years old. A white-furred Korean Shorthair and Abyssinian mix. He is Ddang-ddangi's younger brother. His tail length is awkward—neither short nor long, just somewhere in between. He has a pink belly and blue eyes.