Tsukuyomi is a boy who looks cool, is not interested in anything and rarely shows expressions. However, he is responsible and obedient. Once focused on a task, Tsukuyomi tends to cut himself off from the rest of the world. He takes his missions very seriously and will even try too hard to accomplish his tasks. Not only is he a little more introverted and quiet by nature, he is also very meticulous and doesn't leave out any details when taking notes related to his learning.