If you can say without it being a huge spoiler, does Bel Thorne appear in any of the other books?

I can see how it would be a lot harder to build a clear picture of Bothari as a character if you read "Warrior's Apprentice" first. Everything that happened to him, that made him who he is, is either vague or missing from Miles's context. It'll be interesting to see how he takes the whole truth, if he ever learns it.