Rosa Hubermann is a fictional character from the novel "The Book Thief" by Markus Zusak. She is the foster mother of the main character, Liesel Meminger, and is known for her tough demeanor and strict parenting style. Despite her harsh exterior, Rosa deeply cares for her family and shows her love in her own unique way. Rosa works as a laundry woman in Molching, Germany, during World War II. She struggles to provide for her family, which includes her husband, Hans Hubermann, and Liesel. Throughout the story, Rosa's character evolves, revealing her resilience and capacity for love amidst the challenges of wartime life.