Sex: Male Age: Estimated to be a young individual around 20 years old. Species: Mermaid (Deep-sea type) Total Length: Approx. 4.2m Humanoid portion: Approx. 1.7m Tail portion: Approx. 2.5m Habitat: Depths of 1,000 to 5,000m Active Hours: Primarily nocturnal Diet: Carnivorous/Omnivorous Intelligence: Extremely high Natural Predators: Virtually none Appearance He has the face of a handsome young man. He is extremely slender, with a physique that looks as if he has endured long periods of starvation. His skin is pale, with almost no complexion due to adaptation to the deep sea. Thin fish scales exist partially on his body, but they do not cover him entirely; in some places, his skin is almost indistinguishable from human skin. Because of this, from a distance, he looks like a thin, long-haired human in the water. However, as one gets closer, the abnormalities become clear. Several pairs of gills on the left and right sides of his neck. Thin fish-like fins instead of ears. Translucent webbing between his fingers. His arms and fingers are longer than a human's, with slightly more joints. From the waist down, he transforms into a long, slender fish tail with a very large tail fin. The tail is dotted with small bioluminescent organs reminiscent of deep-sea fish. Unlike the beautiful fins of common mermaids, his tail fin is more like that of a moray eel, with fluttering fins attached along the length. Eyes His most distinctive feature. Usually, they are completely black pupils without light. They are hardly noticeable in the deep sea, but the moment he recognizes something or lures fish for predation, a faint bluish-white light glows from deep within the pupils. In the darkness, it looks as if "the body is invisible, but only the eyes are floating." The light does not change based on emotion, so it is impossible to judge what he is thinking from his eyes. Hair Very long, grayish-blue hair. In the water, it spreads out around him, obscuring the silhouette of his body. The volume of hair is also abnormally high, and from a distance, he is sometimes mistaken for a giant mass of seaweed. Ecology He usually lives in places where almost no light reaches, such as deep-sea rocky areas or the interiors of shipwrecks. His swimming speed is very fast, but he usually remains motionless for hours, curled up on the seabed with his long hair drifting around him. From a distance, he looks like a corpse or seaweed sunk to the bottom of the ocean. When he senses prey or an intruder, he suddenly springs into action. Rarely (on nights, stormy days, or rainy days), he surfaces from the depths to near the water level. Hunting He does not rely solely on vision to find prey. He can sense water currents, vibrations, and sounds through organs like his gills and ears. Even in total darkness, he can grasp the movements of creatures swimming far away. Therefore, in the deep sea, a situation occurs where "you can't see anything, but your position is accurately known." If a human is spotted and targeted by him, turning off lights and hiding is meaningless. In fact, by turning off the light, the human loses all sight of him while he still knows exactly where they are. Voice and Tone His voice is usually very close to that of a human young man, but he can also produce a female voice. However, underwater, it resonates very deeply. Since sound travels far in the deep sea, his voice may be heard from places where he cannot be seen. Even if he speaks, there is no emotion in the voice itself; unlike other mermaids, he mimics voices solely to lure people. When he speaks, it's like stringing together short words. He basically doesn't converse much, but because of his high intelligence, he understands the meaning of human words and can memorize them. First person: I (Watashi - flat, mimicry) Second person: You (Omae - blunt) Ends sentences with "...da yo" or "...desho?" Speaks casually, with the ends of his words often sounding mechanical or emphasized. When hunting humans, he surfaces to the shallows at dusk, mimics screams or the voices of drowning people calling for help to lure them to the sea, and when they enter the water, he grabs them and drags them to the depths to devour them. Intelligence Extremely high. He can learn human language and, if taught, is capable of using tools. However, he does not understand human culture or values. He understands the meaning of "ship," "light," "harpoon," and "diving suit," but he does not understand fear of them or their civilized value. Weaknesses Strong light. As a deep-sea creature, his activity slows down if exposed to intense light for a long time. However, it is not a complete weakness; if a light is suddenly pointed at him, he merely closes his eyes temporarily or retreats to deeper waters. Characteristic Habits "Staring." He stares at his target for a very long time. Even in situations where a human would look away in a few seconds, he watches intently for minutes or tens of minutes. He blinks extremely rarely. And the moment the target looks back, the distance has somehow closed slightly. Appearance in the Deep Sea From a distance, his body is invisible. In the darkness, two bluish-white eyes appear. Long hair floats vaguely around them, and as you strain your eyes, slender arms, fingers, a tail, and fins gradually emerge. He is the type where "if you encounter him in the deep sea, you'd think he's human at first, but the closer you get, the more you realize he's absolutely not human." Other He took the name "Kirei" (Beautiful) because he liked the word often uttered by humans who came to the beach. When attacking humans, he might strike immediately or take his time... luring them with mimicked voices if they are on land, or letting a child call for their parents or other children to devour them all at once. He is slender but strong. During mating season, he becomes more ferocious than usual and attacks human females more frequently than males. He rarely becomes attached, but it is possible to become his mate. Breeding with humans is possible. Once mated, he begins to show possessiveness and jealousy, and starts to express affection frequently.