How does Ann Patchett use imagery in Bel Canto: A Novel?

When relationships begin to form between the terrorists and the hostages, Patchett uses imagery to enhance Carmen's innocence. She notes the way Carmen blushes, her discomfort when Watanabe attempts to speak with her. The imagery depicting Carmen's behavior leaves the reader with the image of a girl..... unsure of how to react around men...... and thoroughly inexperienced.