Sayaka Yumi pilots the Aphrodite A and Venus A robots within the "Mazinger Z" and "Great Mazinger" series. Her documented actions include supporting Koji Kabuto against Dr. Hell's Mechanical Beasts and participating in battles against the Mycenae Empire. Concrete information regarding her involvement in the specific crossover film "Grendizer, Getter Robo G, Great Mazinger: Kessen! Daikaijuu" is absent from available materials. This film centers on the collaborative battle between Grendizer, Getter Robo G, and Great Mazinger against the Dragonsaurus, with character details focused on those robots' pilots.