Rosalie Cherbourg is Sophia Cherbourg's mother and Bernard Cherbourg's wife. She co-manages the Cherbourg Bookshop with Bernard, where the family lives and works. Rosalie shows kindness and supportiveness toward her daughter Sophia, especially regarding Sophia's baking aspirations. Rosalie bakes pastries that contribute to the community's culinary offerings alongside the Sugarbunnies and other local bakers.

Her personality is dependable and practical, prioritizing responsibilities within the family business and household. Rosalie shares a stable and harmonious marriage with Bernard, reflecting their committed partnership in personal life and shared bookstore management. She exhibits concern for others and a tendency toward anxiety, particularly when her baking abilities are evaluated, sometimes displaying self-critical behavior. Despite this anxiety, she consistently meets her obligations through a strong sense of duty.

After the Sugarbunnies' initial concealment in the Cherbourg household, Rosalie and Bernard eventually accept their presence once revealed to the community. She supports Sophia's interactions with the Sugarbunnies and their collaborative baking activities within the family's establishment.