I like your current layout, but of these new three, the first one strikes me as best: It shows the scale of the mech (?) but still keeps her in focus. The second is a lot like what you have now but the symmetrical composition makes it more static, and the third one doesn't make it clear who the main character is because two figures are fully shown. Good luck whichever you choose...
Also, just want to note that I really like the new face you added a couple of posts ago, the one you have now. She definitely qualifies as a "pretty knight.!"