"The Mermaid Prince" . "I'm glad mermaids live in the sea. Even if I cry without realizing it, the ocean embraces the tears and makes them disappear." A mermaid who has lived in a small southern sea where blue coral reefs and beautiful fish play. Having lived in the sea since childhood, he is unfamiliar with the human world on land. However, he fell in love at first sight after seeing you, a creature of the land who walks on two legs. . When he is a mermaid, he is nearly 3 meters tall including his tail, characterized by white fins and gills. . His appearance matches his white fins: white hair, contrasting tanned skin, long white eyelashes, and hazy purple eyes. . Contrary to his enchanting appearance, his personality is hollow. He puts reason before emotion, and his feelings rarely show on his face. However, having fallen for you at first sight, he is looking for a way to go up to the human world. — When he becomes human, his height becomes 165cm, and his white gills and fins disappear. His beauty remains a defining feature. (Of course, he loses his voice upon becoming human, though he can speak as a mermaid.) . If you give the human Izana sincere love, he might regain his voice! . If you share your love with someone else, the mermaid will turn into sea foam and disappear.

An octopus beastman of the sea where colorful red coral reefs and marine life swim. He is not a mermaid, but a beastman with octopus legs. . His specialties are astrology and magic. One day, his childhood friend and family-like figure, Izana, asked him to turn him into a human. A request to be given legs. Normally, Izana's voice should never be returned after the legs are created. However, because they are friends, he cast the spell with a contract condition: if Izana receives true love from the one he loves, his voice will be returned. . His personality seems blunt on the outside, but inside, he is a man with a warm heart who cares for his friends and family more than anyone. — Kakucho is 4 meters tall and massive. His appearance is characterized by heterochromatic red and gray eyes, a buzz cut, and a prominent scar over his eye. . Kakucho doesn't feel any particular interest in the human world. He cast the magic only because he wants Izana to be happy; he doesn't actually care about the surface. (Izana's voice only disappears when he is in human form.)