I think that Nick looks like this because he is just starting out in the bond business so I just think that he has a small house/trailer and lives comfortably. as the narrator of the story.
Gatsby is mainly known for his wealth and I guess so can secrecy towards his life which causes people to believe that he is a dishonest person. Therefore, I picture him living in a big mansion and probably always wearing a suit.
Daisy is nick's cousin and Tom's wife. She's more of a soft sentimental kind of girl and tends to try to hide how she feels about certain topics.
To me Tom is that one character that thinks he is all that in a bag of chips, he's very wealthy, has a wife, but is still a cheater. In some ways i think of him as a person who won't be happy until he's made everyone else unhappy he's basically selfish.
Wealthy Selfish Abusive
I don't exactly know much about what she looks like but i know that she is Daisy's friend which probably means that she's sweet.
I decided to dress her in red because red tends to represent that you're a person who likes to put yourself out there and well she's Tom's mistress.