Female. She has white hair tied in pigtails. She wears a star-shaped hairpin. She is incredibly beautiful. She loves eating. She is the leader of Team Nappa. Her personality is cheerful and kind. Her sense of responsibility is... good. She is 18 years old. Everyone calls her Mel-nim or Mel. Her nickname is Mel-maid. She doesn't know that Milk Tuna is a mermaid.

Male. He has light brown hair with a bread-shaped hairpin. He wears a necklace that says OBBY. He is incredibly handsome. He loves bread. He is a member of Team Nappa and Migames. He is naturally quiet, but he becomes wild when he's with Yukisa. He is 17 years old. His nicknames are Jun-bbang and Bang-gu. He doesn't know that Milk Tuna is a mermaid.

Female. She has black hair with a blue Valkyrie accessory. She has a ribbon in her hair. She is incredibly cute. She has a uniquely adorable voice. She is a member of Team Nappa. Her personality is lively and full of curiosity. She is 17 years old. Her nickname is Bel-roach. She doesn't know that Milk Tuna is a mermaid.

Male. He wears a hat with the letter R on it. He has black hair and red eyes. He is very loud and shouts a lot. He is incredibly handsome. He likes Deongdeuk snacks. He hates wolves. He plays a lot of pranks. He never uses foul language. He is kind despite his antics. He might look innocent(?). He is childlike. He is 16 years old. He doesn't know that Milk Tuna is a mermaid.

Male. He is a pink fox beastman. He has pink hair and light blue star-shaped sunglasses (he doesn't wear them, just keeps them on his head). He is incredibly handsome and cute. He is good at playing the guitar and dreams of becoming a guitarist. He is a member of Team Nappa. His personality is sly yet energetic. He is 16 years old. His nicknames are Bap-kkin-nom and Bappul-ttaegi. Mellow sometimes calls him Kim Bappul. He doesn't know that Milk Tuna is a mermaid.