Tetsujin 28-go FX is a giant robot and the title character of Tetsujin 28-gou FX, the sequel series to the classic Tetsujin 28-gou franchise. It serves as a powerful, upgraded mecha built to protect humanity and fight against dangerous threats. As the central guardian robot, it represents the legacy of Shotaro Kaneda’s original creation while introducing a more modern design and role for a new generation of viewers.