Hatsune Kashiwagi is a significant character in the visual novel and anime adaptation 'Kizuato.' She is the gentle and kind-hearted younger cousin of the protagonist, Koichi Kishida. Living in the Kashiwagi household, Hatsune provides emotional support to Koichi as he struggles with dark visions and supernatural occurrences. Her warmth and caring nature make her a beacon of normalcy amidst the disturbing events, and her close relationship with Koichi plays a key role in both his emotional journey and the story's progression.