I don't know who this is, or where she is from, but no matter how I look at it, this just cannot be Nodoka (I don't care if she's tagged on pixiv, that's not original poster's tag, so it doesn't count). Everything here is just wrong: her hair colour is too close to black, her hairstyle is not right, her glasses, which should be semi-rimmed red, her ribbon, which should be blue.