The boy wasn't unconcious, he knew this. After centuries of experience, he could tell. Alucard simply allowed this to slip simply because, well, Alucard liked his chaos. Without making another new enemy of course, if Hisoka fought back, the vampire could simply claim that he mauled the boy only in self defence. More blood equals more fun after all.

"If he wakes up and kicks you in the groin, don't say I didn't warn you," he spoke, grinning ferally again. And yet he was ready to attack, clawed digits tapping against the floor softly.

The vampire did almost, roll his eyes when Aidou piped up again. Oh, how brave. Only opening his mouth when the initial threat had been exposed of, while hiding in the corner like a rat, during the initial fight. How courageous indeed. Bratty little whelp. Besides. He was simply down on his luck, the only people that had chanced across him were boys. And one made a deal with him too.

"And what are you going to do about it? Whine me to death?" he goaded, spreading open his arms as if beckoning to Aidou. "Of course I know what you're talking about. I want to see, if you actually have the means to back up your threats."