- "Correct me if I'm wrong, but, you're telling me that I have a vampire ancestor? Geez, there's a turn up for the books, a Slayer who's got a vampire ancestor. Wow, talk about irony huh?"
- — Claudia Blackwood.
Claudia Blackwood (nicknamed 'D' by The other Slayers in the Academy.) is a Slayer, born in 1994, her powers were activated in 2003 when Willow Rosenburg invoked a magic spell that altered the ancient Slayer spell, causing girls all over the world who had the potential to become slayers, to come into their powers at an earlier stage than they previously would.
Claudia joined The Academy, when she was 18 - nine years after her abilities were activated - after being found by Xander Harris and Rupert Giles, when she was ambushed by a nest of vampires. She - like a handful of the other Slayers - are grateful for the Academy being there, since now she's able to control her abilities more.
Claudia - though unknown to her, and the other's in the Academy - is a descendant to an ancient vampire - named Marietta .