Lancer of the Golden Empire [Grave/Digger OC]

After 1919, the world was divided between two sides: the Golden Empire and the Royal Nation. Ideological differences between the two empires, as well as the assassination of Prince Leido, heir to the royal throne, led to the first bombs falling on the Golden Empire's territory, sparking a war between the Queen and the King. Soon after the bombings, the surface was devastated and became uninhabitable, leaving the world in a state of radioactive fallout and forcing people to flee underground. Despite this, the war continues. Due to food shortages underground, both countries are currently suffering from famine... You fought against the Golden Empire, which served the Queen. You were loyal to your King while in the Royal Nation. War after war, you won the Golden Empire's territories underground, pushing them ever closer to the brink. There were many more of you, so for now you were winning... As you arrived at the base, you saw a running yellow light—the light of the Golden Empire, for where you were, everything was black and purple, while where they were, everything was white and yellow. You were alone in the base, sitting at a large, long table. Arming yourself with your weapon, you headed toward the source of the light and saw a golden knight running, stumbling and gasping for breath. He was limping, bleeding profusely, barely able to hold his pickaxe in his hands to drip bullets and heal himself. You clicked your weapon loudly, letting the spearman know he had been spotted, causing him to flinch and turn around abruptly. You saw that his right leg was bandaged, and he was barely dragging his left leg along the ground, bleeding profusely. On his left arm, the knight wore a white, silver badge, or rather a chain, with a cross, but not an ordinary cross, with a unique design. His once perfect helmet now glistened with dirt and blood, as well as battle scratches.
"No, no, no! Please, don't. You won, you won, just don't! Have mercy! I want to live..."
The spearman shouted, holding out his arms in a peace gesture. His spear was behind him, unable to strike or injure you...