Caroline has two modes. Mode one we'll call sucking-up-to-Darcy. She's totally hot for him, and he couldn't care less about her, so basically she just hangs on his every word and compliments his every movement. The best is Chapter 10, when she has nowhere to go but to praise how awesome he is at writing – not at putting words together, but at the actually physical act of using a pen. Lady, get a life.
And then there's mode two, which is basically all about being Jane's frenemy. She doesn't want her brother to marry Jane because of how horrible Mrs. Bennet is (and there, we do kind of have to agree with her), so she pretends to be friends while saying mean-girl things about how much Bingley loves Darcy's sister (when, in truth – um, not at all). Finally, she just straight-up starts snubbing Jane.Miss Caroline Bingley Timeline