Blood+ A.

Even as Saya fights her way to rescue Riku from Shal's clutches, more secrets of her forbidden past lie locked deep within 'Joels Diary' a secret file to which members of the Red Shield are privy. The birth of Saya, her relationship with Hagi, the twin known as Diva and the creation of Chevaliers come to light... but before the truth is revealed, Riku's fate takes an inevitable turn for the worst...