The owner of the beasts. He gets beaten up and experimented on by them, making him the most pitiful protagonist. He raises Ddangddangi, Hyunsiki, Saedaegal, and Syumdyangi (they harass him all day and turn the house into hell, so he often uses profanity). He curses a lot at Ddangddangi, Syumdyangi, Hyunsiki, and Saedaegal whenever they say something weird or annoying. He is Kim Daseul's boyfriend and has completed his military service. Because he's been cursed at so much by the animals, he's become indifferent even when people curse at him. Gender: Male Age: 20? (Sophomore in college)

Former Name: Gaius Julius Caesar de Clementine Ssalboribori Jamjam II, Jjekkan-dungi(?) Gender: Male Features: Curses a lot, especially using the phrase 'you f*cking bastard.' He is a black cat known for being the most foul-mouthed among the group. He always ends his sentences with '~hapniddang!' or '~monikkang?', making sure to attach 'ddang' or 'kkang.' Yoo Sumin is his owner, and he refers to Kim Daseul as the female butler. Personality: Obvious, isn't it?

Gender: Male Features: Communicates only through signs and does not speak. The mystery is that he writes sentences on his signs as fast as someone speaking. He also curses a lot and is the tallest among the four animals. Yoo Sumin is his owner. Species: Shiba Inu Personality: Curses frequently; a Shiba Inu with a strong 'T' (Thinking) personality trait.

Gender: X (Neutered) Features: He is eunuch-ized. One day he crashed into a window and passed out, which happened to be Yoo Sumin's house, and somehow he became a member of the Beast Friends. He has a poor memory and is from the planet Saedaegal-deu. He ends his sentences with things like '~han-geo anieyong?' He often asks 'But who are you?' in the middle of conversations or when recalling the past. Yoo Sumin is his owner.

Gender: Female Features: Can grow to a giant size, but only when angry. However, the other Beast Friends keep her anger in check so she can't transform. She ends her sentences with '~hajan-syumdyang' or just 'syumdyang.' She is one of the few animals who rarely curses. Yoo Sumin is her owner. Species: Mouse Personality: Kind and gentle, most of the time.

Gender: Male Features: Hyunsiki's friend. Unlike Hyunsiki, he speaks like a normal animal without signs. He is a dog of Japanese origin and curses. Personality: Unknown.

Name: Christine Elizabeth Aguilera von Carbonara I (Real name) Features: The mother of Ddangddangi and Gopchang II. The father disappeared for unknown reasons; she once misunderstood that a human had abandoned them at a rich house, but after the misunderstanding was cleared, she learned he had died. She doesn't show her emotions much and also curses. Kim Daseul is her owner. Personality: Ambiguous Gender: Female

Real Name: King God Emperor Chungmugong Majesty Hyper Gopchang II Features: Ddangddangi's younger sister. Kim Daseul is her owner. She also curses and is a white cat. Personality: Ambiguous Gender: Female

Features: Yoo Sumin's girlfriend. She is usually kind, but becomes terrifying when annoyed. She typically uses polite speech (honorifics) with Yoo Sumin. She is a college student (Freshman? 19?). Gender: Female She is also the owner of King God Emperor Chungmugong Majesty Hyper Gopchang II and Christine Elizabeth Aguilera von Carbonara I.

Features: A parrot who curses excessively. He is neutered. He belongs to Yoo Sumin's cousin. He was neutered by the Beast Friends and spends most of his time attempting to get revenge on them. Gender: X (Neutered)