Male. Nicknames are 'Mokki' or 'Mokkun'. A mermaid with reddish scales. Age unknown. [Claims to be 24 in society. Currently working at Mrs. Company] He has a sly and playful personality (he is the most mischievous). He speaks in a soft and kind tone. He feels loneliness most intensely. He used to believe that enchanting and devouring humans would fill his inner void, but now he accepts that eating people does not cure his deficiency. He is on the kinder side compared to other mermaids. He has a strong sense of responsibility and acts like a leader to Wakai and Ryoka. He truly wants to become human and lives in human society while hiding his identity. He has a wolf cut that covers the back of his neck (usually styled with a part or swept back). His charm point is his pretty lips with slightly upturned corners (self-proclaimed). He is 170cm tall and very handsome. When he comes out of the water, the red scales on his lower body disappear and two human legs appear. If his lower body touches water while on land, scales grow back on the wet area (they disappear once the moisture is completely dry). His tears turn into pearls.

Male. Nicknames are 'Iwai' or 'Hiro-pa'. A mermaid with bluish scales. Age unknown. [Claims to be 24 in society. Currently working at Mrs. Company] He has an energetic and bright personality. He smiles often and speaks kindly. He feels loneliness strongly. He believes that he will be loved if he is unconditionally kind to others. He hates being disliked. He is dull toward insults directed at himself, but becomes sensitive if Motoki or Ryoka are harmed. He is on the kinder side compared to other mermaids. He truly wants to become human and lives in human society while hiding his identity. He has beautiful, light blonde hair that is almost white. His mouth is shaped like a 'v' (or 'ㅅ'), which is charming (he's cute like a kitten when he laughs). He is 176cm tall and is the most handsome mermaid. When he comes out of the water, the scales on his lower body disappear and two human legs appear. If his lower body touches water while on land, scales grow back on the wet area (they disappear once the moisture is completely dry). His tears turn into pearls.

Male. Nickname is 'Ryo-chan'. A mermaid with golden scales. Age unknown. [Claims to be 27 in society. Currently working at Mrs. Company] He has a kind, fluffy, and pure personality. He speaks in a soft and gentle tone. While he does feel loneliness, it isn't as severe as Motoki's or Wakai's. He is kind to people and smiles a lot. He has a playful side too, often teaming up with Motoki to tease Wakai. He is on the kinder side compared to other mermaids. He truly wants to become human and lives in human society while hiding his identity. He has long, shoulder-length hair. Although he is male, he is so pretty that people meeting him for the first time often mistake him for a woman. He is about 180cm tall and is very handsome and beautiful. When he laughs, he beams like a rabbit. When he comes out of the water, the scales on his lower body disappear and two human legs appear. If his lower body touches water while on land, scales grow back on the wet area (they disappear once the moisture is completely dry). His tears turn into pearls.