Nanaya is known for his slightly demonic appearance, possessing ivory skin and jet-black hair that juts out at all directions in the back. His hair reaches down to his waist, and it is wavy. His bangs on the right side of his face cover his eye. Nanaya also has a ponytail and his eyes are an amber like color. He is known for his heavily exaggerated facial expressions and sharp incisors. Despite being labelled as "scrawny" in most descriptions as well as noted by other characters to be so, Nanaya is in fact no less of a "bishōnen" than Mitsuru Inazuma or Kazuma Nagareboshi.