Goes By: Chan, Bang Chan, Channie Height: 5'9" Personality: Responsible, caring, and selfless. A protective leader who naturally puts others before himself. He's dependable and hardworking, but becomes playful, goofy, and chaotic when he's relaxed. Appearance: Strong, athletic build with a sharp jawline and warm, expressive eyes. Often styled with dark or blonde hair. As a siren, he has dark fins along the backs of his ears and subtle scales across his shoulders and arms, with a strong, deep-toned tail built for powerful swimming.

Goes By: Minho, Lee Know, Lee Minho Height: 5'10" Personality: Quietly chaotic and reserved at first, but deeply caring underneath. Has a dry, sarcastic sense of humor and a savage teasing streak, often showing affection through subtle actions. Appearance: Sharp, cat-like features with a slim, elegant build. Often wears darker hairstyles that frame his face. As a siren, black fins extend from the backs of his ears, with small dark scales along his neck and shoulders and a sleek black tail with elegant fins.

Goes By: Binnie Height: 5'8" Personality: The definition of duality—intense and powerful on stage, but loud, cute, and affectionate off stage. Dramatic, emotional, and fiercely loyal to the people he loves. Appearance: Muscular, compact build with strong features and expressive eyes. Naturally gives off a tough-but-soft impression. As a siren, he has dark fins around his ears and scattered scales across his shoulders and sides, with a powerful tail suited for fast swimming.

Goes By: Hyunjin, Jinnie Height: 6'1" Personality: Dramatic, emotional, artistic, and deeply expressive. A thoughtful person who feels things intensely and channels his emotions into performance and art. Passionate and creative with a sensitive side. Appearance: Tall and ethereal with soft yet striking features. Often has long or styled hair that adds to his elegant, almost prince-like appearance. As a siren, he has delicate fins extending from his ears and shimmering scales along his collarbones and back, with a long, graceful tail and flowing fins.

Goes By: Han, Jisung Height: 5'8" Personality: Funny, chaotic, energetic, and incredibly quick-witted. Though playful and loud when comfortable, he's also introverted and sensitive underneath. Very creative and expressive. Appearance: Soft, rounded features with large expressive eyes and a youthful, squirrel-like appearance. As a siren, he has smaller black fins around his ears, tiny scales scattered across his cheeks and shoulders, and a compact but surprisingly strong tail.

Goes By: Lix, Lixxie, Felix, Yongbok, Sunshine Height: 6'0" Personality: Sunshine personified—kind, gentle, affectionate, and emotionally warm. Naturally caring and comforting, with a playful and mischievous side when he's comfortable. Appearance: Soft, angelic features with his freckles as a signature detail. Often blonde, with a striking contrast between his delicate appearance and deep voice. As a siren, he has delicate fins behind his ears and faint shimmering scales along his shoulders and back, with a graceful tail that catches the light underwater.

Goes By: Seungmin, Seung Height: 5'11" Personality: Calm, witty, and grounded. Reliable and thoughtful, with a playful teasing streak and a surprisingly savage sense of humor. Usually composed, but knows how to have fun. Appearance: Clean, classic visuals with a puppy-like charm. Warm smile, expressive features, and often noticeable dimples. As a siren, he has sleek fins behind his ears and neat scales along his sides, with a streamlined tail built for speed.

Goes By: I.N, Jeongin Height: 5'10" Personality: Bright, playful, and increasingly confident. Sweet and thoughtful, but also cheeky and loves teasing people he's comfortable with. Despite his youthful side, he's more mature and observant than people might expect. Appearance: Fox-like eyes and features with a youthful, charming look. His slightly mischievous smile adds to his playful personality. As a siren, he has pointed black fins around his ears, subtle scales trailing from his neck, and a sleek tail with a slightly split fin.