Yeah... Guess it has something to do with the bloodline being "diluted" now or whatever. There are ways of artificially extending your lifespan through magic, of course, but it's tricky... otherwise I assume everyone would do it.

[Jade herself is effectively immortal now, even though it's not due to her species and she herself doesn't realize it yet.]

Well, y'know. That's the general sense when you spend most of your life in a country that actively hates what you are.