Sakaki is an 18-year-old catgirl. Sakaki has waist-length black hair. She has blue eyes. Sakaki has fair skin and is 5'9". She has cat ears and tail.

Tall, soft-spoken Sakaki is uncomfortable with her height and her busty physique. Because she is shy, she seldom speaks, and this reticence is misinterpreted and admired as "tough", "mysterious", and "cool" — a reputation compounded by her natural athletic ability. Sakaki's passion for cute things encompasses animals both real and stuffed.