Connie's characteristics include arrogance, vanity, and naivety. She is manipulative, as well. Her vanity is one of the reasons that she falls victim to Arnold Friend. She is obsessed with her appearance and she gauges her self-worth by it. This is one of the reasons that she is an easy target for Arnold Friend. eNotes also points out that:
She is deeply romantic, as shown by her awareness of popular song lyrics, but she is interested more in the concept of having a boyfriend than the boyfriend himself.