Chapter 1, when Daisy is talking to Nick PLEASE HELP ASAP

“You see I think everything’s terrible anyhow,” she went on in a convinced way. “Everybody thinks so--the most advanced people. And I know. I’ve been everywhere and seen everything and done everything.” Her eyes flashed around her in a defiant way, rather like Tom’s, and she laughed with thrilling scorn. “Sophisticated--God, I’m sophisticated!” The instant her voice broke off, ceasing to compel my attention, my belief, I felt the basic insincerity of what she had said. It made me uneasy, as though the whole evening had been a trick of some sort to exact a contributory emotion from me. I waited, and sure enough, in a moment she looked at me with an absolute smirk on her lovely face, as if she had asserted her membership in a rather distinguished secret society to which she and Tom belonged.

How does the author show charachterization and imagery in this paragraph?