I find Gilraen very intriguing. I often wondered about the significance of her words "
onen i Estel Edain, u chebin estel anim". The capitalization of the first Estel could signify that she gave birth to a son that will somehow help the Dunedain, and the second estel would then refer to actual literal HOPE.
I'm more inclined to think that
Estel in this case means more than just a name. Gilraen probably foresaw
how Aragorn would "help" the dunedain, and was sort of saying to
her people: "a) don't despair, because I know that hope will come and something good will happen. b) I will not live to see this good."
In a way, she's also "educating" Aragorn about death and how to accept it. When she said "I left no hope for myself", she wasn't despairing about her comming death, but rather accepting it and telling Aragorn that there's nothing he could do to prevent it.
Overall, it is as if she was saying that she finished what she needed to do in the world, and it is the right tie for her to leave it.
PS: Sorry about the essay. Gilraen's line is very thought-provoking, though, and just that made her one of my favourite characters.