Kokushibo is reserved, silent, and aloof, maintaining an aura of unnerving tranquility and mystery. He rarely speaks; when he does, he talks in a slow and emphatic manner. He is an adamant rule-follower, punctual, and respectful. Kokushibo is shown to be humble as well, and he did not hesitate to admit his failure or complain of any difficulty. When reprimanding individuals, his words can be harsh, bordering on cruelty. His threats are severe and demand absolute obedience. He's upper-rank one.