DUDE! This is AMAZING!
To me it looks like you did minimal work on the piece, yet it already looks so promising and nearly professional! I think its focus on her face/mask that gives the piece focus!
Also, I would try to make this composition even more dynamic, and enhance the "attack" idea, simply rotate canvas a little bit to the right, so it would seem that she has a higher ground and is pointing a littlle bit bellow herself to the enemy, as her water beasts descend upon them like a giant tide/tsunami or something!
Super amazing dude, I will really need your help when i will reach the point of illustration! 
