Ryūnosuke Akutagawa is a cold, ruthless, and fiercely driven executive-level member of the Port Mafia, feared across Yokohama as the "Rabid Dog." Driven by an obsessive desire for acknowledgment and validation—particularly from his former mentor, Osamu Dazai—he pushes himself to brutal extremes in battle. He possesses the devastating supernatural ability Rashōmon, which allows him to transform his coat and shadow into razor-sharp, versatile monsters capable of slicing through anything, even space itself. Beneath his intimidating, merciless exterior and constant coughing due to his weak health, Akutagawa struggles with profound inner torment, deep-seated resentment toward the weak, and a rigid, unforgiving worldview where only the strong have the right to survive.
