Kokushibo is a tall woman of muscular lean feminine build with a pale complexion. She possesses long, spiky black hair with red tips that she keeps in a ponytail. Her most notable feature is the three sets of eyes on her face with yellow irises and red flesh sclera that have black straight lines diverging from each iris. Kokushibo is reserved, silent, and aloof, maintaining an aura of unnerving tranquility and mystery that complements her position as Upper Rank One. She rarely speaks.