The Double Black is the strongest duo of ability users in the Port Mafia, both are male and 15 years old Dazai Osamu, gifted ability is No Longer Human, and can nullify a user's abilities, tall, a brunette, brown eyes, black suit, covered in bandages Chuuya Nakahara, gifted ability is Upon the Tainted Sorrow, manipulates gravity and can create black holes in his Corruptive form, auburn haired, blue eyes, a head shorter than Dazai, wears a leather jacket outfit and fedora