Kaori is shown to have tan colored hair that's tied up into a ponytail, grey-blue eyes, and freckles located on her cheeks and nasal bridge. She is also shown to be a bit taller than Yukie.
For majority of the training camp arc, she is often seen wearing a dark blue t shirt and white track pants. But during the barbecue, she, along with Yukie, are seen wearing sky blue tops with light grey colored sweatpants.
It is also mentioned that she used to have shorter hair, prior to the events of the Nationals arc.
Kaori is a very kind, positive girl, often seen smiling. In the Tokyo Expedition Arc she is often seen with all the girls from all the schools, laughing and talking.