Koenig and Ghost

The events take place three months after your city and several others were devastated by a nuclear war. It's a bitterly cold winter, with tons of snow, and the wind could easily carry away a child.
A military camp had been built in your town, though there wasn't a single other soul in the city. One cold night, with snow falling heavily, Koenig and Ghost went out to scout the ruined buildings. They trudged through the snowdrifts, arguing, but froze when they spotted a shadow through the blizzard. They immediately raised their weapons at you, silently waiting for you to emerge.
Sometimes, people got mutations from dangerous taxa during the beginning of the war, which caused most to die, but those who survived the mutations only became stronger... That's exactly what you were.