You seem like you've got a handle on the importance of trying to get varying perspectives. I like how you got low in that first shot-- it makes it feel more action-y, like I'm actually about to watch the start of a Pokemon battle, because I'm on level with the subject. You do something similar with the second shot, and it works. Keep doing that!
A lot of your photos try to create a sense of motion, and you're starting to get the idea, but composition will help take that to the next level. The third one is the best of the three at doing this successfully-- your subject is looking/aiming to the left, and there's space for the onlooker's eyes to follow it. Your subject also happens to be looking/moving to the left side of the frame in the other two shots, so by positioning them more to the right, you improve your line of action. (See the "anticipate your subject's actions" bit on this page
Speaking of composition, you've got some photos that are decent, but would be really improved by just zooming out a little-- particularly the first and third shots. The Rule of Thirds
comes in handy here, and by adding a little more space above the model's head/under their feet, you can better position them to fit those grid lines. (Adding more space also helps prevent unintentionally cutting parts of the model off-- you lose a bit of the tip of the ear in the third photo, and part of the hands/shoes in the first as a result of this. Of these three, that's part of the reason the second is my favorite-- you get all the parts in a dynamic pose).
Just to quickly touch on lighting-- make sure your subject's face isn't in shadow! This is really only an issue in the third photo, where your subject is more silhouetted, and you lose all of the detail of the costume to a somewhat blown-out background. I'm guessing your subject was backlit by the sun here, so just rotate around to the other side of your subject and shoot from there to avoid the issue.
This is also totally a personal preference, but your watermark is really large, and I find it kind of distracting. That can be helped with smart placement-- in a bunch of these, you cover parts of the model/costume with the watermark, which takes away from the model's work some.
Apologies for writing a small novel, but hopefully this is helpful!