The Hollow was the witch who cast the werewolf curse. It was triggered by her death, so everyone thought she was gone, but it turns out her spirit got trapped here in New Orleans, and she was using her influence to subtly corrupt people ever since. Make them crave power.

[She sweeps her hair off to the side, and reveals the crescent moon birthmark that sits on her shoulder blades.]

My bloodline is directly descended from her.