Maria Fianna Albert, younger daughter of the Duke of House Albert, is a high noble blessed with supreme beauty: flowing blonde hair, striking blue eyes, porcelain white skin, and an ample bust. She consistently adorns pure white dresses and gloves. Despite her aristocratic birth, Maria carries herself with dignity and grace, consciously refusing to demean lower-ranking nobles or commoners. She credits this kindness to enduring the hereditary Sixteenth Year Death Curse – a violent, cyclical pain wracking her body since childhood, stemming from an ancestor's defeat of a powerful wizard and guaranteeing death on her sixteenth birthday. Constant support from her family and attendant Amane sustained her through the suffering. Determined to live meaningfully, she enrolled in the Hero Academy to secure employment should she survive.

At the academy, Maria deduced that fellow student Noir Stardia possessed the rare Editor Skill. Hoping he could alter her curse, she approached him. With assistance from Luna Heela, a half-elf cleric whose purification skills Noir modified, the curse was removed without shortening Luna's lifespan, liberating Maria to live past sixteen. Maria harbors deep romantic feelings for Noir and relishes keeping their relationship secret, enjoying the thrill of being his "secret lover." Privately, she sheds her reserved demeanor, becoming openly affectionate, compliant, and erotic around him. She finds arousal in voyeuristic scenarios involving Noir and other women, such as witnessing Emma and Elna massaging his face with their breasts. Her commitment drives her fierce defense of Noir; she is part of a "violently protective" group willing to risk their lives for him.

Academically, Maria operates at Level 30, wielding skills including 「One-Handed Swordmanship B」, 「Charge」, and 「Heal」. She respects self-made individuals over those relying solely on lineage, explicitly praising nobles from low-ranking baronet families who achieve success through personal effort.