Now that we have Jim’s personality, the context of his world, and his style, we can start thinking about his appearance. For example, he lives in a futuristic environment; when we think of futuristic worlds, we often picture plain-colored clothes with clean lines, so white and blue clothes could look right.
Here, it’s OK to use clichés because certain characteristics are embedded in people’s minds and give them an idea about a character or theme; that’s precisely why clichés work, so don’t fear or avoid them.
Let’s say that clothes in the future are tight and fitted to the body. Furthermore, Jim is healthy, active, and plays sports; he’s in good shape, so it wouldn’t be a problem for him to wear closefitting clothes as he wouldn’t be ashamed of his body. Also, he’s an adventurer, so maybe he worries less about appearance and more about clothes that are functional as well as comfortable.
In the character’s description, it was mentioned that he liked to be different from everyone else, so if everyone wears similar clothes, he would surely add some unique details to his attire to represent that attitude: maybe a pin, perhaps a jaunty hat (this would also help represent him as adventurous), or even some kind of reference to space travel and exploration.
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