Thank you for the opportunity to help you with your question!
1. easy-going, occasionally sarcastic, and somewhat optimistic, although this latter quality fades as the novel progresses.
2. an imposing man of muscular build with a "husky tenor" voice and arrogant demeanor
3. Daisy Buchanan's long-time friend with "autumn-leaf yellow" hair, a firm athletic body, and an aloof attitude. She is Nick Carraway's girlfriend for most of the novel and an amateur golfer with a slightly shady reputation and a penchant for untruthfulness
Please let me know if you need any clarification. I'm always happy to answer your questions.