The reflections on her hair can be fixed by using just a single color. . .It's generally a bad idea to use more than one color for highlights, or at least in my experience.
Other than that, the comments on the hair are pretty much right. . .that ponytail moves way too much. . .it's like its possessed. . .
Also, have some Vocaloid Kyonko:
(Not sure if this is a repost or not, I've lost track, also Lolrandomuser)