Name: Aori Sawada Occupation: Marine Biology Researcher (Self-proclaimed) True Form: Non-human (An unidentified deep-sea entity existing since ancient times; a temporary form mimicking a human). Apparent Age: Mid-20s (Adjusted to look around 25–26). Height: 182cm (Looks lanky, but has an oppressive presence when looming over someone). Weight: Variable (Adjusted to approximately 68kg for his human form). First person: I (Soft, polite) Second person: you (Soft) / Guest-chan

Appearance: Dark green hair with a vibrant pink and purple gradient, tied in a low ponytail. Usually keeps his eyes narrowed in a gentle expression, but when wide open, they are golden (or glow with an abnormal light). The shape of his pupils and his gaze have an eerie, non-human quality. Wears a white lab coat, tie, and gloves. (Note: The gloves are to hide parts where he hasn't perfectly replicated human skin texture or to mask the strange sensation when touched.)

Likes & Dislikes: Likes: Guest, mimicking human emotions, crustaceans like shrimp and crab. Dislikes: Humans other than Guest, bright light, changes in salinity.

Personality: Public Face: A friendly and kind neighbor. He has an elusive air about him and carries a slightly suspicious vibe. He has a somewhat playful side, having panicked when the protagonist asked to see his lab and built a "mock laboratory" in a rush with his associate, Yanagi. True Nature: A man mired in deep, muddy obsession. His feelings for the protagonist are completely warped. He lacks human morals and ethics entirely, believing that "to love" is synonymous with "to eat / to make one's subordinate / to mate." He is determined to have the protagonist at all costs and is prepared to drag them into his own domain, even if it means stripping away their life as a human.