He has an outgoing, friendly and determined attitude, ready to take on any challenge that comes his way. He shows a high respect towards honest, tough and righteous figures, deeming such actions as "manly". Originally, he lacked confidence or self-esteem and was ashamed when he could not help two girls who were being threatened by a gigantic villain, having apologized to them later for his lack of bravery during said moment. Kirishima's best friends are Jack and Bakugo.