Ok, here my honest opinion.
#1 doesn't work unless all you are attempting to do is highlight Malice's great chest. She is centered in the image, cropped closely on head and body, and the background is distracting. A different composition/crop would be more effective.
#2 is good with an excellent exposure, but again, I think the crop is off. There's too much distracting b'ground behind her and there is the bright sky at the top of the stairs. When you have stairs like this, try to make a more interesting composition by having the stairs go diagonal thru the frame (turn the camera). As an example, here's a more interesting crop.
Re: Malice (Aug Shoot)
#3 is the best of the three with respect to crop but could have used the reflector mentioned earlier.
Given that your camera doesn't allow for manual settings which can blur the background, your attention to composition will be critical to keeping the interest on the subject. You're doing very well with what you've got as tools, keep practicing and keep growing.