Royal Kuran is a pureblood vampire. She is the younger sister of Kaname, by 1 year, and the older sister of Yuki.
She was cursed by Rido; every time she used her powers, her family would not remember her. One night, Rido attacked, and Royal disappeared along with her memories.
She grew up as a vampire hunter and attended Cross Academy to hunt Level E vampires for Headmaster Cross. But she runs into a nunch of vampires.
She soon meets Kaname and Yuki once again. And she has a future set out for her.
[The Forgotten Vampire Book 1]