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The first image was a coincidence, there was a person standing in front of the train’s exit creating a frame around the person plus a light on top of it which added a little more dramatic touch since there are parts of its illuminated and others do not.

The second image captures the model interacting with an object while it is illuminated from the back making the model stand out and the light also creates flares which give it a special touch.

The third image is the stationary model and the illumination comes directly from above, this creates that the face of the model is half shaded and the other illuminated. I Captured the photo at a lower angle to make the model look bigger.