(I think) Source for OP's pfp for anyone curious like me: https://www.deviantart.com/ashod-chan/art/Render-Violet-Evergarden-670782990
Not 100% sure this is the original source, since it says "render" in the title, but this seems to be the earliest source. The artist's gallery also has pictures with a similar style so I think this is the original.
I also found a Tumblr hair tutorial quoting this as the source for this image:
Not 100% sure this is the original source, since it says "render" in the title, but this seems to be the earliest source. The artist's gallery also has pictures with a similar style so I think this is the original.
I also found a Tumblr hair tutorial quoting this as the source for this image: