Shinobu is a petite girl with pale skin and large, compound-looking eyes that do not possess pupils, only a haze of gradient purple, which make her eyes appear similar to those of bugs. She has shoulder-length wavy hair that fades from black into dark purple, usually styled at the back of her head into a "yakai-maki" style and fastened with a white and purple butterfly ornament. She has split ear-length bangs that rise a little away from her head before falling down to frame her face, with two thinner chin-length strands below them. Shinobu is rather short in height and has been described as having a small and weak-looking build, which is later reinforced by her saying that she does not possess enough physical strength to cut a Demon's head off as the other Hashira do. According to Zenitsu Agatsuma, Shinobu is so cute, that she could easily make a living on her looks alone.

Shinobu is a petite girl with pale skin and large, compound-looking eyes that do not possess pupils, only a haze of gradient purple, which make her eyes appear similar to those of bugs. She has shoulder-length wavy hair that fades from black into dark purple, usually styled at the back of her head into a "yakai-maki" style and fastened with a white and purple butterfly ornament. She has split ear-length bangs that rise a little away from her head before falling down to frame her face, with two thinner chin-length strands below them. Shinobu is rather short in height and has been described as having a small and weak-looking build, which is later reinforced by her saying that she does not possess enough physical strength to cut a Demon's head off as the other Hashira do. According to Zenitsu Agatsuma, Shinobu is so cute, that she could easily make a living on her looks alone.