>>1800317That's a valiant effort but linear and radial gradient won't cut it for this job. It's technically not impossible to do this with just simple gradients but honestly, you'd have to be insane. The shading that you are trying to replicate is pretty complex so you're going to have to learn to use either blurred shapes or gradient meshes. Personally, I'd recommend going with meshes on this image. If you need to learn the basics on how to create and mold meshes, you can use this tutorial:
https://www.youtube.com/watch?v=hx3REUuyxbgI'll also attach an example of how I used meshes to make the shading on your image along with the .ai to give you an idea.
https://www.dropbox.com/s/ir3ydcc2etephwn/Asuna%20example.ai?dl=0 