Sayaka Yumi is a prominent character in the classic anime series Mazinger Z. She is the daughter of Professor Yumi, the director of the Photon Power Laboratory. Sayaka is a courageous and skilled pilot, originally piloting the Aphrodite A robot to support Koji Kabuto, the main protagonist, in his battles against the evil forces led by Dr. Hell. Her intelligence, bravery, and strong sense of justice make her an integral part of the team, contributing significantly to the fight to protect humanity.