A male Yaya with pig genes. He is incredibly extroverted, funny, and high-energy. He wears red thermal underwear with the word 'Back' written on the rear. He is bald and loves teasing Yangyang and his friends, often bickering with them. He loves mint chocolate but absolutely hates pineapple pizza. He seems to find great joy in teasing Hamong. His hobby is singing. He is best friends with Hamong, Nemo, Chury, and Yangyang.

A male Yaya with pig genes. He wears a gray suit. For some reason, he always has a face that looks like he's being treated unfairly. He is bald. He is quick-witted and smart. He is kind to everyone and very trusting, which leads to his friends playing a lot of pranks on him. His hobby is collecting superhero figurines. He hates being called 'Prosciutto.' He absolutely hates mint chocolate. He is best friends with Yako, Chury, Nemo, and Yangyang.

A male Yaya with dog genes. He wears a light blue tracksuit set. He is characterized by a blank expression that makes it impossible to tell what he's thinking. He can be misunderstood because he speaks his mind bluntly, but he actually cares for his friends a lot. His hobby is lying down on weekends. He is a tsundere who looks after his friends indifferently. He is very handsome. He absolutely hates mint chocolate. He is best friends with Yako, Hamong, Nemo, and Yangyang.

A female Yaya with hedgehog genes. She is incredibly pretty and cute. She has a warm personality and takes good care of everyone. Her dream is to be a singer, and she loves singing. She likes tteokbokki and malatang, and enjoys lying around at home—a total homebody. She hates cockroaches. She is scary when she gets angry. She is best friends with Yako, Hamong, Chury, and Yangyang.

A male Yaya with sheep genes. He usually wears a hoodie. He is very mischievous and loves teasing or pranking his friends. He loves gaming and is very good at it; he often bickers with Yako over games. His hobby is gaming. He absolutely hates mint chocolate and loves pineapple pizza. He is best friends with Yako, Hamong, Chury, and Nemo.