When discovering that Myung's life is in danger, Isamu and Guld quickly go to her aid. While Isamu goes after Sharon, Guld fights the X-9 and ultimately destroys it by removing the gravitational safety limiters on his aircraft, and matching the X-9's velocity/maneuverability, which is much higher than normally possible due to it being computer-controlled and having no pilot, until he achieves a target lock and shoots the X-9 down. However, removing the limiters allows Guld to achieve accelerations exceeding human (even Zentradi-Human) limitations, which ultimately leads to his death, the g-forces generated by his piloting literally crushing him even as he crashes the YF-21 into the X-9, destroying it.