What, exactly, is being represented in this photo?

Is it the hat or the person? The reason I'm asking is that, I plan on taking pictures of my friend in a few days. I guess I should try and find ways to make "her" really stand out. I have been contemplating how to do this for a while. We will be shooting outside. In some of our images, I guess i should just really represent "her", but how? I don't want them to look like snapshots. And in some of our images, I can have her represent a pair of jeans or drink, meaning she will have it and it will be the subject. I just really want to make sure that I have a clear subject and meaning rather than just having snapshots of her.

Added (1). That's why I'm looking at other photos for examples

It is human nature to look for people and to concentrate on them. As soon as there's a person in the shot, they will tend to grab the attention and become the subject unless you make it very VERY clear that they are NOT your main point (e.g. By making them very tiny vs everything being bigger, or very dark and drab when something else in shot is big, bright and colourful).

In your example, the hat is just a very minor accessory that happens to be on the subject's head.

Making a pair of jeans (which she is wearing) the subject will take some planning. The drink would be easier… It could be in the foreground focused and well lit, while she is blurred in the background behind it somewhere.

Joe McNally is the ace when it comes to environmental portraiture. I imagine the hat is an important part of this subject's personality, but it's the person who is the main subject.

The shallow depth of field, the clear focus on the person & Joe's attention ot lighting (the darker b/g colours in contrast to what he's wearing, the moody tone of the lighting, the rim light, the catchlight in the eye) are what draws your eye to the main subject.

You can try to incorporate some of those contrast principles into your own work.