Imca serves as a heavy weapons specialist in Gallia’s penal military unit, Squad 422—the Nameless—where she is designated Ace No.1. A Darcsen seeking vengeance against the Valkyria who destroyed her village, she carries this purpose into every mission. In combat, she wields the unique multiple-targeting weapon known as the Var, deploying its area attacks by expending shared Special Points.

Her fight extends to the Imperial unit Calamity Raven, a group of Darcsen soldiers pursuing independence under Dahau’s leadership. This confrontation is shaped by their shared ethnicity and divergent ideals regarding Darcsen liberation. As a Darcsen, Imca belongs to a people persecuted across Europa, forced into menial roles and blamed for the historical Darcsen Calamity.

Operating within the Nameless, she conducts deniable black operations for the Gallian Army, missions so hazardous that the unit is hunted by both enemy and allied forces—a situation worsened by a traitor in their ranks. She participates in the squad’s final engagement against Dahau and Calamity Raven, who attempt to activate an ancient Valkyrian superweapon to forge a new Darcsen nation after the Empire and Gallia declare a cease-fire. To protect the fragile peace, the Nameless declare themselves killed-in-action.

After the Valkyrian weapon’s destruction, Imca departs alongside her former squadmates to start anew. Her future path remains open, influenced by the choices of her commanding officer, Kurt.