Sayori has coral pink hair, cut chin-length and slightly curled at the ends, with a large red bow on the upper left side of her head. Like the other female characters, she has two prominent strands of hair beside her bangs, and her eyes are a bright sky blue. She is of short-to-average height.

When in school, she wears the standard issue female school uniform consisting of a warm gray blazer fully unbuttoned and untucked, brown sweater vest, white shirt slightly unbuttoned and crooked.