Heidi

A spirited, nature-loving girl who finds joy in the mountains and in simple acts of care. Her energy and honesty sometimes clash with city manners, but she forms deep bonds with those she meets, especially Klara and Sebastian. Her homesickness drives much of the emotional arc as she longs to return to her grandfather and the Alps.

Heidi's stern yet loving grandfather who bears a mysterious and protective presence in his alpine cottage. He has been at odds with the village despite his loyalty to family, and he carries the memory of his lost son. His eventual reconciliation with the villagers restores peace to the community.

A wheelchair-bound girl who receives Heidi's care and friendship in Frankfurt. Her world opens up as Heidi helps her walk again, revealing a resilient spirit beneath a composed exterior. Klara's trust in Heidi grows as she experiences kindness beyond rigid routines.

A wealthy widower who seeks a companion for his daughter and oversees a grand, orderly household. His gratitude toward Heidi for helping Klara leads him to champion Heidi's stay, highlighting the tension between care and homesickness. He embodies the benevolent but distant world of wealth and propriety.

A thoughtful doctor and friend to the Sesemann family who identifies Heidi's sleepwalking as a symptom of emotional distress. He recommends that Heidi return home, underscoring the healing power of returning to one’s roots. His guidance anchors the moral pivot of the story.

The loyal butler who endears himself to Heidi and the household. He provides steady, quiet support and helps bridge the gap between Heidi’s mountain world and the city. His calm presence contrasts with the more rigid authorities in Frankfurt.

Her sister's companion who initially brings Heidi to Frankfurt; she later returns to care for Klara as a cook at the Sesemann house. Dete's decision to place Heidi with the Sesemann family triggers the main arc and Heidi's experiences away from the mountains.

Heidi's friend and goatherd from the mountains, whose companionship reflects the simple, outdoor life Heidi cherishes. Peter represents the authentic mountain world Heidi carries in her heart even while she is away.

Mother to Peter, providing a parental continuity in the mountain community. Her presence hints at the supportive, close-knit network that surrounds Heidi and Peter in the Alps.