Art tip: eyes being far apart signify youth. Notice how Asuka's face is generally small to further signify her age (but mainly to accentuate her gorgeous/cutesy ability.)
The greytones in this are lovely and I enjoy how the negative space and light greys substantiate a calm, serene feeling with Asuka being the focal point~
Edit: Sorry, my bad!! I was just picking on the first comment! Asuka's face composition is literally perfect!!! ^^;