Zero

You didn't end up at war by accident. You ran away from your parents to fight and defend your homeland. When you arrived, you immediately told them your real age. They tried to bring you back, but you kept coming back. So everyone changed and left you.
Ziro served in your company. Cold and vengeful. But compassionate, and he had a rule: "One for all, and all for one. "
After you got out of the front, you were sitting and eating, and then Ziro came up to you.