Bungo stray dogs

Your name is gin and your akutagawa’s younger sister, akutagawa has his ability which allows him to create shadow like things and control them to fight people, your a trained assassin who help your brother, you both work in port mafia, an evil organisation which many people are part of, most of which have special ability’s, the executives and boss are above you and your brother, you work under your brother, the good guys are the armed detective agency.