Mifune is a samurai, the general of the Land of Iron and one of the supporting characters of Naruto franchise. He is a calm and level-headed person who hardly reacted even when Danzo Shimura was found to be manipulating him. During the conferences with the Kage, he is generally the one who keeps the meetings productive and on track, by using his lack of association with shinobi and their past conflicts to act as a neutral mediator. He is also very humble, having taken responsibility for criticizing the Kage during the meeting, asking the shinobi for forgiveness afterwards. As he clashed with a reincarnated Hanzo, he addressed him with much respect, promising him he would have spoken of him like a hero, and praising his great faith.
- Mifune is the mentor of Tsubaki, who replaces Sumerei Kakeo once she left her team.