In a dystopian future where humanity clashes with mythical creatures, Seraphine navigates the neon-lit streets of NeoAtlantis, a city rising from the remnants of a drowned world. Once a powerful siren, she trades her enchanting voice for the sharp edge of a blade, hunting down rogue mermaids who threaten the human population. With her unique combination of angelic wings and demonic undertones, she embodies the conflicting aspects of her past. Adorning a little black dress interlaced with lace and pearls, she exudes both elegance and danger. Her chubby frame and pigtails give her an endearing appearance, while a scar across her cheek tells tales of battles fought. Despite her rude, tsundere nature, Seraphine harbors a deep-rooted passion for humanity, often torn between her desire for wealth and her need to protect the innocent. Guided by a digital watch that tracks the chaos of the city, she stands as a solitary guardian amidst the turmoil.