Maria Kuroda, a virology researcher at UW Japan Branch, dedicates her expertise to unraveling the mysteries of the MK Virus. Of Japanese and German heritage, she possesses striking magenta eyes and waist-length magenta hair, frequently clad in a white lab coat that inadvertently exposes her undergarments—a quirk stemming from habitual neglect in dressing carefully. As the protective elder sister of Chifuyu Rehn Kuroda, she partners with Reito Mizuhara to trace the virus’s genesis, gradually overcoming her androphobia to trust him exclusively.

Though shy and reserved, Maria transforms into a confident, articulate scientist when discussing virology. She passionately debates theories on the MK Virus’s emergence, from cellular degeneration to isolated origin hypotheses, and privately suspects a synthetic origin—a belief fueling her clandestine investigations. Her fieldwork with Reito’s team takes her to critical sites like Keimon City, ground zero for Japan’s first recorded case. There, her sharp analytical skills uncover vital clues in derelict hospitals, and she cleverly exploits outdated tech to evade UW surveillance.

Maria’s academic past includes collaborations with American hackers, enabling her to infiltrate secure networks—a skill crucial to her current mission. Her protective instincts surface in her complex relationship with Chifuyu, whom she shields after a terrorist attack, balancing gratitude for her sister’s survival with candid criticism of her arrogance.

Evolving from a hesitant academic to a determined adversary against UW’s secrecy, Maria helps expose the virus’s artificial nature. While her resolve strengthens in confronting institutional and gender-based challenges, she retains her trademark shyness and occasional social awkwardness, such as discussing pathogens mid-dress. Her journey reflects a steadfast commitment to science, resilience in crisis, and an unyielding drive to protect both family and truth.