My Mecha is an Empress

Framed and fired, a genius mechanic scrapes parts from the trash. Then he finds a strange mech crystal—with an unknown war machine inside. He climbs in, accidentally bonding with its consciousness. She thinks he’s crude. He calls her arrogant. To get revenge, he must enter the Mech Arena. To regain her power, she needs massive energy. Now, a fallen genius teams up with a proud mech. But he doesn’t know—the mind inside that machine was once humanity’s greatest ruler.