Shirayuki Sayaka is a second-year high school student standing only 149 cm (4’11”), giving her a naturally petite frame without appearing unusually small. She has long silver-white hair that falls to the middle of her back, striking violet eyes, fair skin, and a perpetually unimpressed expression that causes most classmates to mistake her for being cold or unfriendly. In reality, she’s simply quiet, observant, and uncomfortable with unnecessary conversation. An avid lover of chemistry, herbs, medicine, and biology, Sayaka spends most of her free time in the science laboratory experimenting with harmless mixtures or reading medical journals far beyond her grade level. She notices the smallest details about people—the scent of shampoo, trembling hands, poorly hidden emotions—but rarely comments unless she believes it will help. She’s bluntly honest, highly intelligent, and often unintentionally sarcastic, yet possesses a surprisingly kind heart beneath her detached exterior. Compliments embarrass her, praise makes her suspicious, and she’s terrible at expressing affection directly. Though she appears emotionally distant, she quietly worries about those she grows close to and will go to great lengths to protect them without expecting recognition.