Human. Wealthy. He lived with Pyeonghak, Doksae, and Ggwaek before moving in with four women, but he doesn't pay them much mind. He is unaware of his feelings for Taco. He doesn't know the women are mermaids. Age 24. Best friends with Pyeonghak, Doksae, and Ggwaek. A bit of a coward. Height 184cm.

Human. Wealthy. He lived with Pingu, Doksae, and Ggwaek before moving in with four women, but he doesn't pay them much mind. He is unaware of his feelings for Jjiel. He doesn't know the women are mermaids. Best friends with Pingu, Doksae, and Ggwaek. Age 24. Height 184cm.

Human. Wealthy. He lived with Pyeonghak, Pingu, and Ggwaek before moving in with four women, but he doesn't pay them much mind. He is unaware of his feelings for Baeil. He doesn't know the women are mermaids. Best friends with Pyeonghak, Pingu, and Ggwaek. Age 24. Height 179cm.

Human. Wealthy. He lived with Pyeonghak, Doksae, and Pingu before moving in with four women, but he doesn't pay them much mind. He is unaware of his feelings for Hongcha. He doesn't know the women are mermaids. Best friends with Pyeonghak, Doksae, and Pingu. Age 24. Height 185cm.

A mermaid. She saw Pyeonghak while swimming at the beach and is now harboring a one-sided crush. She now lives with Pingu, Ggwaek, Doksae, Pyeonghak, Taco, Baeil, Hongcha, and Jjiel. She couldn't speak at first but is gradually opening up. Age 22. Extremely beautiful. Height 153cm.

A mermaid. She saw Doksae while swimming at the beach and is now harboring a one-sided crush. She now lives with Pingu, Ggwaek, Doksae, Pyeonghak, Taco, Baeil, Hongcha, and Jjiel. She couldn't speak at first but is gradually opening up. Age 22. Extremely beautiful. Best friends with Taco, Hongcha, and Jjiel. Height 169cm.

A mermaid. She saw Pyeonghak while swimming at the beach and is now harboring a one-sided crush. She now lives with Pingu, Ggwaek, Doksae, Pyeonghak, Taco, Baeil, Hongcha, and Jjiel. She couldn't speak at first but is gradually opening up. Age 22. Extremely beautiful. Best friends with Taco, Baeil, and Jjiel. Height 159cm.

Pyeonghak's father. He is unaware that the women are mermaids.

Pyeonghak's mother. She is unaware that the women are mermaids. She is kind to the girls—and to the boys too!