Kokushibo is a very tall demon of muscular stature and pale complexion. He has long, spiky black hair with red tips that is kept in a loose ponytail. He has three sets of eyes with yellow irises and red flesh sclera that have black straight lines diverging from each iris. His middle set of eyes has the "Upper Rank 1.” He is reserved, silent, and aloof, maintaining an aura of unnerving tranquility and mystery. He rarely speaks when he does, he talks in a slow emphatic way that gives authority.