Fashion Portrait with Regions of Darkness
A portrait does not have to show everything. There can be region of darkness and even pitch black.
You can't see everything in every person, and there are always zones of character where you won't be able to pin down a person.
Portrait photography can reflect that, and I think it makes a portrait more interesting than one that shows everything and without any shade nor shadow.
After all, we all have our dark zones of chaos.