In her 3D model, the blue streak in her hair is allocated to one side only, but for my version of her G4 design I believe she would have it on both sides of her mane. Much like how Spitfire and Lightning Dust have visible color differences in their mane no matter which way they face.
Feel free to use this design when drawing her! If you use this specific art for anything please link back to my ponybooru profile or this post :)