Anya's theme song is totally this one. Many people see her as optimistic, but actually she's still a sad little Mordesh nugget.
There's a some sort of desperate vibe in this song, and it captures her perfectly. The hook is pretty fitting, too, as despite the things she went through, she still tries her best to keep her chin up and hold on. Also, yelling.
An instrumental alternative would be this.
It has a Grismaran vibe to it. It sounds rather melancholic, but still has a hint of hopefulness in a few parts.
AND... I found a better song for my Aurin main, Virith.
This song sounds as if they're reflecting on the loss of their homeworld.
Unfortunately, I can't find an instrumental song that fits them. Sad face.