It was the group decision that we don't use a softbox. One flash with no modifier on portable 120 V battery pack. The fill light is definitely too hard.
So I shot the #1 w/o the light.
I set aperture at F8 to capture the sun flares in #2, and #3. That was a wrong setting because too much background.
Now I see the #4's cloth issue. wasn't paying too much attention at the time.
Again, thank you for your comments.
There are sooooooo many young girls want to be a model. As long as you are willing to pay $$, you could shoot them everyday.