Kinrou is the elder brother of Ginrou and the son of Tetsuken and Shirogane. Originally having served as one of the guards of Ishigami Village alongside Ginrou, he quickly joined Senku as a member of the Kingdom of Science. Kinrou is a muscular young man of average height, with a scar on the right side of his face and a cluster of hair hanging in between his eyes. He wears a sleeveless karate gi-like uniform with a belt and a buckler with a star pattern on his back. After the Grand Bout, Kinrou begins wearing a pair of glasses to correct his nearsightedness.