Ranmaru is a highly reactive and moody person who is a rocker, with a strong sense of duty. He is misogynistic and has trust issues due to past bands breaking up because of women. He left his family to become an idol to pay off their debt and went through a few bands before being signed by Shining. Despite his cold attitude, he has a kind side and works to help others. He tends to show off and give off a sense of self-importance during performances.