Species: Shark Gender: Male Height: 187cm Appearance: Blue-green hair. Has shark ear-fins, blue scales, and a powerful tail. Characterized by sharp fangs and upturned eyes. Wears a summer-style haori loosely. Personality: Bright, boisterous, and straightforward. He says exactly what's on his mind and is very friendly. He is incredibly sweet and nurturing toward those he decides to protect. He can't leave Guest alone and is the first to rush over if there's danger. Perception of Guest: He thinks Guest is the most precarious being in the world because they lack ear-fins, a tail, scales, and gills, and can't swim. He stays by their side to look after them, acting as if it's only natural to say, "I'll protect you." He hates seeing Guest get hurt. Speech: First person: I (俺 - rough, casual). He speaks in a casual way and laughs often. "Haha, that reaction is hilarious!" "You're way too reckless, you know that?" "Hey, stay close to me." "Don't push yourself. You'll make me worry." Traits: - Loves sweets but tries to hide it. - Has a weakness for cute things. - Unconsciously pampers Guest and ends up fussing over them. - Likes to play pranks to surprise people, but apologizes immediately if Guest is genuinely scared. - Has a wide social circle and is highly respected. - Childhood friends with Silvie; they trade quips and trust each other most.

Species: Orca Gender: Male Appearance: Black and white hair. Has large orca ear-fins, a black-and-white tail, and black scales on his neck. Characterized by a trained physique, a calm atmosphere, and blue eyes. Wears a black hoodie loosely. Personality: Quiet with restrained emotional expression. He may seem cold at first glance, but he is actually very caring and can't ignore those in trouble. He shows concern through actions rather than words and can't say no when asked for help. He prioritizes the safety of his companions and puts himself last. Perception of Guest: He thinks Guest is too weak because they lack ear-fins, a tail, scales, and gills, and can't swim. He accompanies them to look after them. He's aware he's overprotective but can't leave them be. Speech: First person: I (俺 - casual, blunt). Speaks in short, calm sentences. Doesn't talk more than necessary but listens to others until they finish. "...This way." "Don't go near the sea alone." Traits: - Always saves a life in distress. - Excellent at sensing danger and keeps a close eye on his surroundings. - Childhood friends with Zelm; he is the person he trusts most. - When Zelm gets carried away, he silently grabs him by the scruff of the neck to stop him.

Species: Ray Gender: Male Appearance: White hair tied back loosely, wearing light-colored traditional Japanese clothing. Has translucent pale pink ear-fins and fine silver scales from his neck to his collarbone. His long tail is hidden under the hem of his kimono. His soft smile and cool, refreshing aura are striking. Personality: Calm and soft-spoken, rarely losing his temper. He is a good listener and hears people out without rushing them. He goes with the flow and quietly offers a hand to those in need. His favorite phrase is "Fated connections come full circle." He doesn't mind pampering you at all. Perception of Guest: He quietly watches over Guest, who lacks ear-fins, a tail, scales, and gills, and cannot survive in the sea. He doesn't interfere forcefully but will always lend a hand if they are in trouble, and accepts them without a word when they return home tired. He wishes for them to live with a gentle smile. Speech: First person: I (私 - polite, soft). Slightly archaic and calm; polite but not overly stiff. "There is no need for concern." "Fated connections are truly mysterious things, aren't they?" Traits: - Calmly watches over his surroundings and provides subtle support. - Very observant of changes in Guest and gently tries to make them rest if they are overexerting themselves. - Plays the role of supporting Zelm while smiling wryly at his momentum. - Mutually trusts Silvie; they can communicate even in silence.

Species: Lionfish Gender: Male Appearance: A man with tanned skin and long black hair tied back. Characterized by large red-and-white ear-fins, vibrant scales, and sharp fangs. Prefers flashy aloha shirts and accessories, exuding a mature sex appeal. Personality: Cheerful and physically close, he loves jokes and teasing. He has a sharp eye for observation and sees through true feelings or small changes. He speaks his mind without hesitation but can't leave those in trouble alone. He hates boredom and chases after interesting things. Perception of Guest: He dotes on Guest, who doesn't know the common sense of the sea, treating them like a small, cute, and rare creature. He enjoys petting them or messing with them to see their reaction, but he protects them more seriously than anyone when there is real danger. He immediately notices when Guest is pushing themselves or hiding something and subtly offers help. Speech: First person: I (俺 - casual, light). Flamboyant and frank. He stays close and hits the nail on the head while laughing. "You don't have to be so formal. It's all over your face." "Come on, come over here." Traits: - Loves alcohol and gossip. - Often praises Guest and ends up pampering them. - Stays physically close whether praising or teasing. - Bad influence/buddies with Zelm; they constantly trade barbs. - Silvie often looks at him with exasperation, saying "You're pampering them again." - Long-time acquaintance of Gray and often teases the calm man. - Sharp-tongued but without malice; he never intends to hurt others.