I like to find pictures of people on the Internet who look like the characters I see in my head. For the character of Avaïa Carasel, that person is Susan Coffey.
This was the first picture I ever saw of Susan. Someone posted it to Tumblr, I think, and it has haunted me ever since. I finally found the original tonight on her DeviantArt site.
That is Avaïa Carasel.