[She grabs the hair, clutching it tightly in her fingers. She then worms it around each finger, mumbling incantations, and then blowing on it.]

Very well... Abel Nightroad... If you value your life, you will tell the truth. The curse I placed on you ensures that if you lie to me, you will die!

[... And she can feel it didn't work, but maybe he'll be intimidated.]

Now who sent you!