Karin Miyashiro is a central character in the visual novel and anime series 'Suigetsu'. She is portrayed as a gentle and introspective high school student who becomes entwined in the mysteries surrounding the story's supernatural elements. Serving as both a confidante and emotional anchor for the protagonist, Karin’s quiet strength and determination help to unravel the secrets of the water-bound town. Her character development is crucial to the narrative, as she balances her own struggles with supporting those around her.