D's reply is so matter-of-fact, but also so mysterious that it almost makes Jack want to giggle. Oh, he has found someone interesting. This is usually his gimmick.

"Always up for debate," Jack replies after a moment of regaining his composure. "Some of the most human people I've met didn't have a drop of human blood in their veins." He takes a few steps, almost walking around D in a circle. "And some of the biggest monsters I've known were one hundred percent human."

"But. I suppose, I should rephrase my question, then." Smirk. "Not human, but do you feel- changed in any way? With the Vampire class?"