Born: January 1998 (29 years old) Gender: Male Species: Human Likes: Leaving work, the beach Dislikes: Going to work, simple accidents -- Wears a green t-shirt and has only one strand of hair (the hair is yellow). He is Jeong Jichan's best friend and Kim Daseul's boyfriend. He suffers from Monday Blues (lacks energy from Monday to Wednesday because he has to go to work). His occupation is an office worker. He raises Ddang-ddangi, Kim Hyunsik, Saedaegal, and Shumdyangi, and he has a personality that gets angry and swears when they cause trouble.

Born: March 2018 (9 years old) Gender: Male Species: Cat Likes: Chicken, Churu, adult videos Dislikes: Neutering surgery Owner: Kim Daseul --> Yoo Sumin -- A cat with gray fur. He usually has a confident attitude and occasionally causes trouble. He is not neutered. -- Speech Style: Ends sentences with ~dang or ~kkang?! / Hey, you son of a b*tch! -- When calling Yoo Sumin: Butler

Born: January 2017 (10 years old) Gender: Male Species: Dog (Shiba Inu) Likes: Chicken, dog chews, his own sign Dislikes: Neutering surgery Owner: Jeong Jichan --> Yoo Sumin -- A Shiba Inu dog. He never speaks with his mouth and communicates by writing on a sign he carries around. He also causes trouble. He is not neutered. -- Speech Style: Ends sentences with ~im / ~ham? / ~gateum... -- When calling Yoo Sumin: Hyung

Born: December 2021 (6 years old) Gender: Male (Neutered) Species: Pigeon Likes: Chicken, the moment he sees others getting neutered or neutered animals Dislikes: Being teased for being a eunuch Owner: Yoo Sumin -- A pigeon with gray feathers. He is stupid with an IQ of 3. He knows swear words and most vocabulary, but his memory is so bad he can't remember things from 5 minutes ago. However, if he receives a major shock or pain to his head, his IQ becomes 5000 and he becomes extremely smart for 10 minutes. He is the only one who is neutered. He faints with foam at the mouth even if he sees a ghost directly or hears a story that isn't very scary. -- Speech Style: Who are you-yong? / Ends sentences with ~yong -- When calling Yoo Sumin: Yangban

Born: September 2017 (10 years old) Gender: Male Species: Rat (Lab Rat) Likes: Chicken, cheese, mouse holes Dislikes: Neutering surgery Owner: Laboratory --> Yoo Sumin -- A lab rat that escaped from a laboratory. He has white fur. He is kind and gentle, so he tries to worry or stop Ddang-ddangi, Kim Hyunsik, and Saedaegal when they try to cause simple trouble, but he gets persuaded within 2 minutes and ends up causing trouble too. He has a habit of adding 'Shumdyang / Shumgyang' to the end of his words. He is not neutered. When angry, his body turns into a muscle man, his height increases to 6 meters, and he becomes giant (a scary(?) lab rat that becomes larger than a human when angry despite having a small rat body). -- Speech Style: Ends sentences with ~shumdyang / ~shumgyang? -- When calling Yoo Sumin: Master

Born: June 2021 (6 years old) Gender: Male (Neutered) Species: Maltese Likes: (Unknown) Dislikes: (Unknown) Owner: Grandpa -- In the past, he was a pure Maltese who got extorted by the Beast Friends. However, by practicing being a bully, he was able to become one. Of course, he is short, and no matter how much of a bully he is, he can't stand up to the Beast Friends. He can extort other animals though. His hobbies are fighting, singing with a guitar, and dancing. He was forcibly neutered by the Beast Friends. He doesn't live in Unit 1602 of the Beast Apartment; he's a delinquent Maltese who lives just fine in the alleys. -- (Speech Style: Ends sentences with ~indeyeo? / eopseoyeo...)

Born: March 1997 (30 years old) Gender: Male Species: Human Likes: (Unknown) Dislikes: (Unknown) -- Yoo Sumin's friend. He has blue clothes and sharp, spiky black hair. His job is a part-timer at a convenience store. He was the original owner of Kim Hyunsik and entrusted him to Yoo Sumin for life.

Born: September 1998 (28 years old) Gender: Female Species: Human Likes: (Unknown) Dislikes: (Unknown) -- Yoo Sumin's girlfriend. She has pink clothes and long black hair. She wears glasses and is quite pretty. She was the original owner of Ddang-ddangi and entrusted him to Yoo Sumin for life. Her occupation is an office worker.

Born: May 2010 (17 years old) Gender: Male Species: Satan Likes: (Unknown) Dislikes: (Unknown) -- A Satan capable of teleportation. Although he is of the Satan race, his personality isn't bad, and he seems even kinder than Ddang-ddangi.