|Power Source||Atomic Energy|
|Notable moves||Alloy X Arrows|
Gokyun U5 is a humanoid robot resembling a Greek warrior. The head features a helmet-like design with a fin on top and small portrusions facing backwards. Its forearms and legs are decorated with straps that cross each other. Its left arm features three fingers instead of five and are smaller as they are built to hold and pull on its arrows.
Abilities and EquipmentEdit
The Gokyun U5 is armed with a large bow that fires arrows topped with Alloy X heads. This makes it a formidable foe against opponents constructed by Alloy Z and its derivatives.
Dr. Hell presented Baron Ashura the robot for another attack on the Mazinger Z and its companions after demonstrating what its Alloy X arrows can do on Alloy Z. As the Mechanical Beast appeared it was confronted by the Mazinger and Aphrodite A. Gokyun released an arrow on the Aphrodite, piercing its neck and disabling it. The Mazinger Z fought back, and in spite of the Alloy X arrows damaging it and rendering some of its attacks useless it destroyed the Gokyun U5 with a Rocket Punch.