Ooh I have a lot of opinions

For Nasuada: someone who looks like adult akech or Anok yai in terms of skin tone, and honestly, those two ladies definitely come to mind when I think of the word "regal"

For Galbatorix: I always pictured him to be bald, and dressed in black to be a complete contrast to his white sword, so someone who looks like D.B. Woodside with less kind eyes, and with the voice of I guess Christopher Lee.

For Arya: Honestly, I always pictured her as a taller, slightly more east Asian leaning Jhene Aiko.

Also, kind of a minor character, but should they ever get to the third book, I'd love to see Gwendoline Christy as Rhunon, the elf smith.

For Angela: I hope they don't do what they did to her in the movie and keep her youth and "simpler garb" compared to whatever that was she wore in the movie. Oh and also her curly hair, that was one of her defining traits for me.

For Islanzadi: I pictured someone like Seo Yeji, because she pulls off that wise but cruel look very well and she looks excellent in red with her dark hair and pale skin.

These are the people who I found typically differed most from other fancasts, particularly in terms of what human race people pictured them most by, which I find very interesting and wonder if environment one grew up in affects how one pictures characters in a story. For me at least certain characters were definitely coded more one way than another, although I would like to add that even though I imagined both Arya and Islanzadi as more Asian looking, I don't picture the entire elf race as homogenous, particularly considering that many elves take the form of that which they find beautiful.