Heidi is the cheerful, energetic young protagonist of Alps no Shoujo Heidi. She is a kind-hearted orphan who is sent to live with her grandfather in the Swiss Alps, where she gradually wins his affection and becomes close friends with the goatherd Peter and others in the mountain village. Her role in the series is central: she embodies innocence, warmth, and a deep love of nature, while her experiences drive the story’s emotional growth and family themes.