Anne is a young French girl who lives in a village near the forest where the powerful witch Maria resides. She first appears in the story when she accompanies her mother to visit Maria, seeking medicine for her sick grandmother, Martha, who is a longtime friend of the witch and unable to make the journey herself. Anne is also deeply worried about her father, who has been called away to fight in the Hundred Years' War, a conflict that defines much of the anxiety and hardship in her daily life.

Physically, Anne is a child with brown hair that falls to her shoulders and blue eyes. Her personality is characterized by a sweet and carefree nature, though she is not naive to the suffering around her. She maintains a genuine faith and a trusting disposition even when confronted with terrible events or the political machinations of adults. This steadfastness makes her one of the few genuinely innocent and morally unambiguous figures in a world filled with complex and often selfish motivations. Anne serves as an important emotional anchor in the story, representing the ordinary villagers who are most vulnerable to the ravages of war. Her personal stake in the conflict, particularly her fear for her father's safety, gives Maria a concrete and relatable reason to continue her interventions in battles, beyond the witch's broader ideological opposition to war.

Anne's key relationships are central to her role. Her grandmother Martha is a significant figure in her life, and when Martha falls gravely ill, Anne becomes caught in a conflict between Maria and the Church. The local clergy, led by Brother Bernard, use Martha's illness as an opportunity to turn the village against Maria. They offer their own medicine and claim that Maria's treatments were actually poison, a lie that Anne struggles to understand because she cannot fathom why a religious authority would deceive her. This situation places Anne in a painful position, torn between her family's history with Maria and the pressure exerted by the Church. Her development throughout the series is marked by her exposure to this hypocrisy. She is forced to witness firsthand how those in power manipulate the truth for their own self-serving agendas, a harsh lesson that challenges her innocent worldview. Despite these trials, her essential character remains one of loyalty and compassion, as she is ultimately among the humans who most directly inspire and defend Maria against heavenly judgment. Anne has no notable supernatural abilities; her strength lies entirely in her humanity and her unwavering faith in the face of overwhelming adversity.