She works while she is still friends with Nora and her unwealthiness doesn’t seem like it’s having an effect on their friendship. Which it shouldn’t. Yet Christine is still content with her lifestyle, she works hard and gets a paycheck. While Nora is like a child in a House of Mirrors at a carnival. She is so scared of herself and doesn't know what to do with herself. It’s like the pair should just completely switch lives and things would be perfect. But a story wouldn’t be a story without a little bit of conflict. Which is why Ibsen adds the character of Christine to compare and contrast Christine and Nora. Creating one of the foils in the novel.
To conclude, Nora and Christine completely display themselves as opposites. They want what the other has. Through the pairs transition we can see how they change and why things change. The foil has an effect on the story, which is hard seeing from a naked eye. The foil is what truly molds the stories conflict and