Ryoko Futaba manages the Pia Carrot 2nd restaurant, overseeing operations and staff with exacting standards for service and conduct. She tests new employees like Koji Maeda through demanding tasks, her initial sternness transforming into professional respect as he demonstrates dedication. A close friendship binds her to Aoi Minase, who later manages Pia Carrot 3rd. Ryoko shares a familial tie as cousins with Shinji Yano, Koji's friend, adding personal layers to workplace dynamics.

Her responsibilities expand when she becomes substitute chief at Pia Carrot 2nd during "Welcome to Pia Carrot 2.2," stepping up after Yusuke Kinoshita's transfer to prepare the third location. This temporary role underscores her reliability and leadership within the chain. By "Welcome to Pia Carrot 3.3," she emerges as a seasoned veteran in the organization. Across all appearances, she remains an emotional anchor for staff while ensuring operational efficiency.