Kirishima 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". He has a very noble and willing personality, as well as being kind-hearted and friendly towards his fellow classmen. Originally, Kirishima lacked confidence or self-esteem and was ashamed when he could not help two girls who were being threatened by a gigantic villain.