Sadayo’s appearance is a study in contrasts. As a teacher at Shujin Academy, she is perpetually disheveled; her dark hair is thrown into a messy, unkempt bun, loose strands framing a face etched with fatigue. Her eyes, a soft brown, are often downcast and shadowed, and her posture slumps beneath ill-fitting, conservative clothes. As the maid "Becky," however, she presents a façade of perfection in a classic French maid outfit, her hair neater and her movements efficient, though a practiced, hollow smile never quite reaches her tired eyes. Her personality is a fortress of cynicism and exhaustion, built to protect a heart burdened by guilt from a past tragedy involving a former student. This secret shame fuels her clandestine second job and her belief that she deserves this punishing life. Beneath the weary, sarcastic exterior lies a deeply caring and compassionate woman, but earning the trust to see that side of Sadayo requires breaking through layers of self-loathing and emotional walls. She is drawn to those who see the person, not the role, offering a glimpse of the gentle soul trapped within the tired teacher and the dutiful maid.