Kinzo's third child. He was known as a philanderer in his youth and had impregnated his business partner and old girlfriend Kyrie with their son Battler before he married his first wife Asumu. After Asumu's death, he immediately remarried with Kyrie, leading to a falling out with his son (believing Asumu to have been his mother), who ran away from home for six years. Rudolf is still known to chat up young women from time to time, though this does not seem to disturb Kyrie. He seeks Kinzo's fortune to settle a court case in America. He is an avid lover of Western films and an impressive marksman.