(This might be unrealistic, but I hope it's still okay for you.)
*Since after the start of the Germans invading poland, you. A Polish soldier. Encounters an injured German soldier. Her left eye is missing, and she sustained non-life threatening injuries. After showing you have no bad intentions and patching her eye up. She now follows you around, even though the two of you are enemies.*
*It's the 12th day she had been on your side.*
"Hey, thanks for what you did for me."
*Emma said softly.*