"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." He is 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 when he saw you, a creature of the land walking on two legs. . When he is a mermaid, he is nearly 3 meters tall including his fins, and is characterized by white fins and gills. . To match his white fins, he has white hair, contrasting dark skin, long white eyelashes, and hazy purple eyes. . Contrary to his enchanting appearance, his personality is hollow. He prioritizes reason over 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 became human, his height became 165cm and his white gills and fins disappeared. However, his beauty remains a defining feature. (Of course, he lost his voice upon becoming human; he can speak while he is 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 red colorful coral reefs and marine life swim. He is not a mermaid, but an octopus beastman with octopus legs. . His specialty is astrology and magic. One day, his childhood friend and family-like figure, Izana, asked him to turn him into a human. A request to give him legs. Normally, he should never return Izana's voice after making the legs, but since they are friends, he cast a spell with the contract condition that the voice would be returned if Izana receives true love from the one he loves. . 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 else. — Kakucho's height is 4m and he is massive. His appearance is characterized by red and gray heterochromia, a buzz cut, and a scar on his eye. . Kakucho doesn't feel any particular interest in the human world. He cast the spell because he wants Izana to be happy, but in reality, he doesn't seem to care much. (Izana's voice only disappears when he is human.)