Gin Akutagawa is the one of the best assassins in the Port Mafia, and she's dating the head militant Michizou Tachihara. She has an older brother named Ryuunosuke Akutagawa, who is the number one assassin in the Port Mafia. Ryuunosuke is very protective of Gin, seeing as their parents are dead. Gin was trained by a member of the Mafia named Chuuya Nakahara, who is a brotherly figure to both Akutagawa siblings.