Addie serves aboard the Hagoromo airship as one of three crewmates who mirror each other in appearance despite lacking biological ties. Employed by the Oni Company, a logistics firm specializing in cargo transport, she operates alongside Betti and Cindi, their unity emphasized through synchronized tasks maintaining the vessel’s functions. Addie’s crimson eyes and scarlet tie contrast her companions’ features—Betti’s amber gaze and Cindi’s emerald irises. The trio functions as an indivisible unit, their collaboration depicted as a constant across operations, though records remain silent on individual histories or expanded narratives beyond their shared duties.