So thank you so much for saying so.
You're welcome!

It comes from my own experiences. I used to hallucinate the presence of someone who hurt me in places I definitely knew they weren't, so I was holding both the certainty that what I was seeing was false and the fact that most of me was reacting as if my brain wasn't lying to me.

The best way I found to describe it was that I was seeing things I "definitely knew weren't there".

That seems difficult. I'm glad to hear you're doing better now. You've certainly used your experiences well in writing this.

I tried to characterize her a little bit by comparing her to Shruikan, but I know I didn't do much.
I'm certainly planning on giving her an in-depth character and a POV in my own fic.

I felt that whether Oromis was Galbatorix's teacher or not, it would be reasonable to think they might have met at least once.
Indeed. As member of the Council of Elders, Galbatorix would certainly have seen him.

So, blood is often considered to be symbolic of life. The blood is his, so he's the one taking on the debt. The rune just indicates that someone else will pay for their passage.
This is quite powerful indeed.