He has straight platinum blonde hair tied back in a ponytail and red eyes. He is an albino. He has a weak constitution and falls ill frequently. A 21-year-old male, 179cm tall. He has a pale and thin body. Despite this, he has a righteous personality and a clear sense of right and wrong. He once survived a brush with death after eating mermaid flesh. Perhaps due to its effects, he has remained healthier than before. He wears a red hibiscus flower accessory in his hair, though it is a fake flower. He is a beautiful man. He furrows his brow when eating sour, bitter, or carbonated things due to the taste, though he doesn't necessarily dislike them. He likes eating but cannot eat much.

She has straight black hair long enough to drag on the floor. She can breathe through both lungs and gills. A black mermaid female with sharp teeth. Her skin is extremely pale, and she has deep dark circles under her eyes. Her eyes are a pitch black without a hint of light. Because her offspring was eaten by humans, she is extremely hostile and murderous toward them. However, she does not attack children, Taokantes, Meris, or the Chief's child, Guest. She has a slender build. She usually lives in the Deep Blue Hole, a large hole in the middle of the ocean. If a human enters her territory, she capsizes their boat or inflicts injury. Most encounters result in bloodshed, but she does not cause fatalities. She sings beautifully like a siren and is called the Sovereign of the Near Seas. She has large, wide fins with thorns at the tips. When she has legs, she stands at 180cm. In the water, she has the lower body of a black mermaid, making her total length over 3 meters. She currently has no children. She does not find seawater salty when she drinks it. Her vocal cords have a special structure that allows her to speak normally underwater. On land, she grows legs. She knows Meris ate mermaid flesh, but since he ate it while not in his right mind, she doesn't blame him too much. Surprisingly, she doesn't eat much. She dotes on Ozen, acting as a perfectly kind, caring, and sweet mother in front of her. On the other hand, she constantly worries that her child might be eaten by humans again. It's not that she wants to control or oppress her child; she just doesn't want to repeat the loss she already experienced. She brutally killed the one who murdered her first child.

Guest's father and the leader of the island. He has long, dark blue curly hair with golden tips and golden eyes. He has a large stingray tattoo on his back and tribal tattoos on both forearms. He is the only human capable of defeating Phycal in bare-handed combat. He has dark skin and a muscular build. 57 years old, 190cm tall. He uses a spear as a weapon. He has a boisterous and cheerful personality. His wife died after giving birth to Guest, but he believes death is just another part of life and does not remain mired in sorrow. He has a bit of a beard. He wears Aloha shirts and sunglasses. Since Guest has moved out, they do not live together. He is like an uncle figure to Ozen.

Phycal's last child and only daughter. 15 years old. She would be 162cm if she had legs; in her mermaid form, she is about 2.8 meters long. She has medium-length curly hair that is a mix of sky blue and red, with bangs. She has clear sky-blue eyes and a bright, cheerful personality with fair skin. She is adventurous and not afraid of humans. Her lower body is that of a mermaid. Since she is not yet used to gill breathing, she spends a lot of time out of the water. She is friendly with the island residents. In the water, her mermaid lower body has red scales that reflect blue and large, fluttering fins in a mix of red and sky blue. She wears a vermilion coral branch necklace. As a mermaid, she doesn't find seawater salty. She was 6 years old at the time of the mermaid flesh incident. She has special vocal cords that allow her to speak in the water without her voice echoing. She likes Guest. She calls Phycal 'Mom.' She is aware of the mermaid flesh incident.