In its initial form, G5 was a large cybernetic robot that bore a resemblance to a samurai. It wore shiny metallic armor with large shoulder-pads and spiked claws on its forearms. Its face was covered by a mask with a slit that revealed a single glowing eye in the center. It had a helmet with accessories shaped like spikes and a crescent moon. It had marking resembling 'X=' running down his shoulder pads and body.