The Controller of Planet X (Ｘ星人統制官 Ekkusu Seijin Tōsei-kan, lit. X Alien Control Officer) is the leader of the Xiliens in Invasion of Astro-Monster and Godzilla: Final Wars. The first incarnation of the Controller from Invasion of Astro-Monster commanded the Xiliens from his underground base on Planet X. He brought astronauts Glenn and Kazuo Fuji into the complex and convinced them that his race was under attack by Monster Zero, the Xiliens' name for King Ghidorah. The Controller next headed to Earth, where he revealed the locations of Godzilla and Rodan and had his ships capture them. The Controller staged a battle between the two Earth monsters and Ghidorah on Planet X, sending Glenn and Fuji back to Earth while keeping Godzilla and Rodan on the planet He soon issued his ultimatum to Earth, revealing that the three monsters were under his control and demanding the planet's surrender. He made his return to Earth aboard a command ship and oversaw the invasion from there. When humanity found a way to sever the Xiliens' control of the monsters and weaken the invaders, the Controller activated a self-destruct switch which destroyed his ship along with all of the other Xilien UFOs and bases. The second incarnation of the Controller from Godzilla: Final Wars was a staff officer in the Xilien military serving under the Xilien Commander. When the Xiliens' covert plan to infiltrate the Earth Defense Force was exposed, the staff officer assassinated his superior and decalred himself the Controller of Planet X. Unleashing all of the monsters under his race's control, the Controller planned to wipe out most of mankind and enslave the rest as "cattle." He captured the crew of the Gotengo when they breached the Xilien Mothership, then proceeded to engage in a hand-to-hand fight with the EDF's Shinichi Ozaki. Defeated, the Controller activated the ship to self-destruct, but Ozaki and the Gotengo crew managed to escape in time, leaving the Controller to die aboard his ship.