He offers something of a smile, there and gone again in a second, so tight an expression that it's obviously not very kind, but it's not exactly cruel, either. No, if anything, it's knowing.

"I came to ask a great many questions of you and hear your answers, whatever they may be."

If he wants the truth, he can always speak with the guards. And he may yet do that upon leaving, but for now...it's Hisoka's replies that he's most interested in. What the clown is willing to say, what he isn't willing to say...there's a lot to discern from such things.

He shakes his head when prompted with the second part of Hisoka's question, however.

"Is that why you agreed? Simply so you could see me?"

Answering a question with a question.