[From anyone else, Alucard would have become annoyed and expected the other person didn't understand or underestimated him. But this is D, who bears centuries of experience.

Alucard considers, then bows his head.]

I was raised by my father and mother to know restraint. However, I know it is possible I could fail.

I'd already intended to work with one out scientists to replicate the capsule you gave me. If there comes a day that I fail to resist, then perhaps it was fortuitous that a vampire hunter has joined us.