Miyuki Sakakibara is a second-year piano student at Shirosoubi Music Academy, where she also works as a music tutor. She has shoulder-length blond hair, wavy and curtained with a middle part. Her amber-colored eyes are of a tareme shape. She has a slim, pale build and medium breasts, giving her a teenage appearance.

She is typically seen in blouses, coats, miniskirts, shirts, skirts, and a ribbon tie, and is often depicted carrying a book. Her personality is friendly and kind. She uses "watashi" as her personal pronoun. Her primary role is that of a pianist and a tutor.