Nice vector and nice choice of anime/character. Definitely not enough love for Love Live.
There is not too much advice which I can give you, your vectoring is sharp and well done. If you want improve more,
perhaps try to experiment. Stronger gradients, low opacity painting onto the shapes. Here you could have also tried even
lighter and more colorful outlines, which would be only a bit darker as the darkest part of her skin. Same goes for
shirt. You could also enchance her MP3 device and add something onto the display. Its your vector, you say what will be
on and adding your own elements is the key about gaining a upper hand above the original source.
But this vector could be definitely a example to many here who only upload into quantity. You are now a official member of GJ-Bu.