Fuubi Kase (加瀬風靡), a scarlet-haired law enforcement officer with keen golden eyes, serves as an assistant inspector distinguished by her crisp police uniform and methodical approach to investigations. Her duties frequently intersect with a central figure entangled in criminal cases, fostering a dynamic marked by dogged skepticism; she interprets his recurrent presence at crime scenes as more than coincidence, prompting rigorous scrutiny.

The symbolism of her name mirrors her role’s intricacies: "Kase" (加瀬) blends "addition" and "rapids," evoking accumulating momentum, while "Fubi" (風靡) fuses "wind" with "extravagance," suggesting a persona entwined with both motion and unpredictability. This linguistic duality underscores her investigative tenacity and the layered challenges she navigates within her professional sphere.