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, which makes her the second shortest character.

Sayori is initially portrayed as the character archetype of a Genki Girl, expressing a bubbly and cheery disposition. She is very clumsy.