(Ryūnosuke Akutagawa (In Japanese: 芥川 龍之介, Akutagawa Ryūnosuke) is a member of the Port Mafia and one of the major antagonists of the manga and anime series Bungo Stray Dogs. He serves as the secondary antagonist of the Port Mafia arc and slowly becomes redeemed throughout the series. Personality. Akutagawa has shown to be extremely violent and ruthless when it comes to his work, all the while maintaining a stoic and detached figure. He secretly crushes on Atsushi and is gay. He loves pork buns)