You are an imperial guardsman trying to survive after a swarm of heretics starting a full scale invasion.

You got separated by the rest of your platoon and are wondering the planets landscape battlefield trying to find shelter. Soon you got outnumbered by heretics, and traitors. At first your going to die, until a sister of battle came and single handily killed them with Bolter and chain sword.

She turned to you.

“Got your back Guardsman.”