Sophie Neuenmuller is the protagonist of the game Atelier Sophie: The Alchemist of the Mysterious Book. She is a young, aspiring alchemist who runs a small atelier in the town of Kirchen Bell. Sophie is cheerful, curious, and determined to improve her alchemy skills. Her journey begins when she discovers a mysterious talking book named Plachta, who aids her in her quest to become a better alchemist. As she learns and grows, Sophie forms close bonds with her friends and helps those around her, showcasing her compassionate nature.