Ema Shirotsume is the main protagonist of the visual novel 'Shirotsume Souwa.' She is a reserved and curious young woman who returns to her old hometown after many years away. Through her journey, Ema uncovers hidden secrets about her past and the mysterious events that took place in the town. Her role in the series is central, as the story is primarily told from her perspective, and her actions drive the narrative forward as she reconnects with old acquaintances and faces unresolved memories.