I'm famililar with the books, all 4 of them, even though im new to them. I did have a character in mind, that i thought up after reading Breaking Dawn.
My character could be a 250yo vampire, having been bitten when her new fiancee was attacked by nomadic vampires at their home along the Santee in 1759.
Although how this fits in to you, I dont know, i just thought I would offer it, and see what you thought.