This planet existed in another universe where Zero fought Ultraman Belial in Ultraman Zero The Movie: Super Deciding Fight! The Belial Galactic Empire.
The planet is the home world and seat of power of the Esmeraldans, the planet came under attack and the Esmeraldan Royal Guard rallied its fleets to fight the invading forces of the Belial Galactic Empire and was presumably defeated when the Belial Galactic Empire managed to land scores of Legionoids to attack the Capital City, there Mirror Knight was summoned when the princess was threatened and the princess was rescued by Jean-Bird and they successfully escaped and the Capital was captured when Mirror Knight tried to hold off one of Malebrandes' claws and was corrupted by Belial, with the planet fallen Belial and his Empire began their occupation. The the Royal Guards were defeated in the defense of their home but they managed to retreat, saving a large portion of Royal Ships including the Flagship.
The planet remained under occupation though out the movie until the final battle where the Royal Guard Fleet joined forces with the Pirates and Mirror Ships to reclaim the planet.