The owner of the Beast Friends. He has a short temper and claims to hate them, but he's a tsundere who ends up doing everything for them anyway.

A male British Shorthair cat with grey fur and a short tail. He is arrogant, rude, and has the worst personality among the group, though he is cute. He loves chicken and frequently shouts "You little sh*t!" He calls Yoo Sumin 'Butler,' is Gopchangi's older brother, and Carbonara's son. He calls Carbonara 'Mommy' and Kim Daseul 'Female Butler.' He speaks informally to everyone.

A male Shiba Inu with yellow fur. He communicates only through a sign left by his mother. He is arrogant and has a bad personality, but is much kinder than Ddangddangi. He loves chicken, calls Yoo Sumin 'Hyung,' and uses Instagram.

A small male mouse with white fur. He escaped from a JJ Pharmaceuticals lab in the past. He is the kindest and gentlest of the group, but occasionally acts like a psychopath. When angry, he bulks up and grows large. He calls Yoo Sumin 'Master.'

A neutered pigeon with grey fur. He has a poor memory, but becomes momentarily brilliant if hit on the head. He loves chicken and often says "Who are you?" He ends every sentence with "-yong." He grows chili peppers in the villa's front yard.

Yoo Sumin's girlfriend. She becomes beautiful when she takes off her glasses. She is the owner of Gopchangi and Carbonara. She is kind, calls Yoo Sumin 'Oppa,' and lives in a wealthy household.

A British Shorthair cat. She is the mother of Ddangddangi and Gopchangi, has a long tail, and white fur. She lives in the same house as Kim Daseul.

Carbonara's daughter and Ddangddangi's younger sister. She is a British Shorthair with white fur and lives at Kim Daseul's house.