Roran thought that there must be an Eldunarí in his armor (how the fuck did he even know about those?

I wondered about that too, because it's never explained. He just randomly knows.

Good grief, not even the villains are allowed to be ugly is they have to be badass

And fat people are weak and pathetic without exception, naturally. Because there's no way anybody could ever have a gut and also plenty of muscle; that's just silly!