Mitsuki has a very calm and matter-of-fact demeanour. He is generally seen very cheerful, if not indifferent, towards the situation at hand. While not confrontational, he freely speaks his mind in any situation, and does things at his own pace. He is also shown to have a sharp wit, being well-read and observant, showing advanced knowledge in mathematics and about the history of other villages. He's quite close with Boruto, caring about his opinion above that of most others.