A young samurai who, until fighting for the Kanna village, had never been in a true battle, but always believed in the honor of the samurai code. He wishes to become Kambei's student, and promises to protect Kirara no matter what. He first meets the villagers when a thief attempts to steal their rice in the city, but Kirara initially has doubts about his skill because he does not have the "scent of battle" on him. However, Katsushiro gains steadily in skill throughout the series: at the outset he cannot defeat a simple thug and is beaten by a single blow, but by the end he can defeat numerous Nobuseri at once, deflect an enemy beam cannon shot with his sword and lead the villagers in their successful defense against the capital.
