Gravion (2002)

In the year 2041 AD, the solar system finds itself under siege by a ruthless enemy known as Zeravire, an alien force that mercilessly obliterates military establishments in its path. Amidst the shadow of this impending catastrophe, a wealthy visionary named Klein Sandman has been clandestinely assembling an army, his secret weapon being Gravion - an enormous, gravity-powered robot. Simultaneously, a young man, Eiji, infiltrates Sandman's base in a desperate search for his lost sister, crossing paths with another youth, Toga. These two, united by circumstances, soon find themselves part of a sextet of unlikely heroes. Together, they must pilot the mighty Gravion, harnessing its immense power to counter the relentless onslaught of the Zeravire menace. Their camaraderie, courage, and resolve form the only bulwark against the alien invaders threatening their world.

Gravion is an action show featuring Masumi Asano and created by Masami Obari.

Gravion is currently streaming on Crunchyroll and Funimation Now.