So here's a little inspiration to get into the mood..
Bridget von Hammersmark, German actress / spy, 1940s glamour. A nipped in brown suit, red lipstick, cigarette holder. For the twisted, add blood for post injury scenes.
Shosanna Dreyfus, the Jewish girl who runs the local cinema (awesome). She dresses quite drab through most of the film - grey slacks, muted tee, flat cap, beige mac - war time utility chic. That is, until the end - that amazing red dress with red lipstick smeared on her face like war-paint (iconic) as she burns down the cinema and kills Hitler.