Claudia.
I've been experimenting recently with using my Roundflash modifier off-camera instead of a softbox or umbrella.
While not as big and soft as those, it still produces nice results, with a beauty-dish like look. I love how it looks when used with the 180mm lens. The subject really pops. The especially handy thing about it is how small it folds up, fitting in my backpack taking up about the same space as a camera body. For these pictures I had a friend simply hold the flash and modifier in place. A voice-activated-light-stand, if you will.
Check out the official promo vids of the Roundflash to see how convenient it is.
Nikon D750 with Nikon 180mm 2.8
1/400, f3.2, ISO 200
Godox TT685 + Roundflash camera left, near model. (Trigger: Godox X1)
Evening sun was the ambient+hair