Interesting piece I gotta say, but I need to keep my routine:

On the tecnique used, there is a little to say since is pretty much good.
The pose itself is kinda ok. I mean, I got what's her pose but it's hard to pull off "realistically".
80% of the pose is fine, except the arms:

The left one looks too straight and it extend itself too much in the centre of Aseriana. It's hard to explain with words, but it's abit unrealistic. If you want, I can draw you a sketch of what I mean for that, just send me a private message.

The right one is pretty much ok except the fact that it's abit unclear the position of the arm.
Considering how much the sword is low positioned, she probably has her arm folded, but there is no hint to that, not even a single portion of elbow showing.
Another thing, is the hand looking too little considering the fact that it should be in second plain (first one occupied by the sword).

Apart from these little things, the shading is good, even tho the chest should be fixed. There is too much shadow even when the light source seems that could easily light it up.
One last thing! The sword handle is really hard to notice, and it's in a folded position (try to draw a line from the start of the handle to the top of the blade and you will notice [if you don't contact me that I'll show you]).

On the creativity used, it gotta say that is low average. It's reeeally simple for a character.
The armor could have been way more interesting just like the sword, but since you wanted to keep it simple, it doesn't attrack too much.

In the end, I think that is a nice drawing anyway. If you want to discuss about my review or if you want to correct me, send me a private message. I'll be more than happy to talk.
Keep drawing lad.