Dona Marta, also known as Mrs. Martha Moppet, is the mother of the main character, Louise Little Lulu Moppet, and the wife of George Moppet, with whom she resides as a family. Her background is defined by her consistent domestic presence and her central role in managing the household and caring for her family. Her personality is conveyed through her actions as a nurturing figure who is renowned within her home for her exceptional culinary skills.

Her primary motivation is the care and well-being of her family, as she regularly manages household affairs alongside her parenting responsibilities. Dona Marta’s role in the story is that of a supportive and stable maternal presence, providing a backdrop for Lulu’s adventures. Her key relationships are with her daughter, Lulu, and her husband, George, with her interactions centering primarily on these routine family dynamics. There is no recorded significant evolution or character development for Dona Marta across the series, as her foundational traits as a mother and wife remain consistent. Her notable abilities include being a great cook, a skill for which she is well-known within her family.