She strides forward with her knife and does what she has to do. Natalie looks on with interest, as if taking notes in a biology lab, and Billie grabs the case, strapping it to her chest with the severed hand dangling like an obscene accessory.”
-- Narrator (1 )

Importance: This is their first mission and Billie takes the lead several times, ensuring that they complete their objectives. The description that she “does what she has to do” is typical of the language. The reader has no doubt that she is cutting off the man's hand, but the author does not say it outright.

Basically, everyone who wanted to go hunting Nazis and didn't have a mandate from their government got together and decided to write their own. They were the oddballs and eccentrics, the quirky ones who made brilliant leaps in logic and didn't so much go by the book as fling it out...
-- Billie (2 )