Responses

I know right? As I heard the prophecy, I immediately thought of his Father and his Brother right away.
Either they (Castillo) did not want her to destroy the oath and killed her which is very improbable, or the royal family or whatever it is called ordered them (Castillo) to kill her.
They have an oath so they can't deny the order so it would make sense if they (Castillo) killed her.
Or maybe its someone else, there's a looot of possibilities ╮(⌒▽⌒)╭
I'm sure he will get killed by her Father and Brother ╥﹏╥