I really like X23 and i would spend drawing her some more time. Here's a quick inked sketch with colour test for a training outfit.
Do you like it?
Well anyway if it's supposed to be an X it doesn't really work that way. In all X-Men uniforms when they try for something like this they always put it at a slight angle to show that. Because it doesn't really work as it is now. Pretty much all that needs to be done it change the angle of the smaller stroke, the large one going down the side that can stay but if the smaller one was just had its angle changed a bit you could still have that X effect you were trying to go for and it would pop out a lot easier. As it is now every time I look at it looks like some kind of anti-christ symbol or something.
I didn't notice this before too but the symbol on her shoulder if that's supposed to be a stylized X again the position doesn't work. It's just too far to one side that it alters the shape of what you're trying to go with.