Kokushibo's stoic and reserved disposition. Kokushibo is reserved, silent, and aloof, maintaining an aura of unnerving tranquility and mystery that compliments his position as Rank One. He's 190 cm tall, has long black hair with red tips and has a dead brother (which he killed) and a former demon slayer before turning into a demon, and has 6 eyes, he's sometimes seen as a cruel monster but he's respectful towards the opponents he sees as worthy