Marie Mamiya is a central character in the visual novel series 'Starless.' She is depicted as the sophisticated and enigmatic matriarch of the Mamiya family, who oversees the operations of the luxurious mansion where the story unfolds. Marie is known for her commanding presence and is integral to the narrative, as she introduces the protagonist to the mansion's unique and often morally ambiguous world. Her character is critical in exploring the series' themes of power dynamics and personal desires.