Nagisa's Grandmother is a supporting character in the anime film Kimi no Koe o Todoketai. She is the elderly grandmother of the protagonist, Nagisa Yukiai, and lives in the same seaside town. Her most defining trait is her belief in the concept of kotodama, the idea that spirits dwell within words. She passed this belief down to Nagisa through stories, which deeply influenced Nagisa's worldview and later actions. The grandmother's exact age is not specified, but she has grey hair and is depicted as a calm, nurturing figure. Her role in the story is primarily off-screen; she serves as the source of the spiritual foundation that drives Nagisa's curiosity and eventual foray into radio broadcasting. The relationship between grandmother and granddaughter is one of affectionate guidance, with the grandmother's teachings giving Nagisa a sense of wonder about language and communication. The grandmother does not undergo any on-screen character development, as her influence is established through Nagisa's memories and retellings. Her notable ability is her knowledge of local folklore and her skill in storytelling, which she uses to pass on the kotodama legend. While the narrative does not explore her personal history or motivations in detail, her impact is central to Nagisa's emotional journey.