[Contrary to his needs? That supposes Sai understands emotional needs to be an actual thing. He's only about a year into the resurgence of the concept that emotions are something he is actually capable of in the first place, and the first tentative steps toward emotion being a motivator for certain goals, such as retrieving Sasuke or freeing your oppressed people.

So the question confuses him. The remark that follows is easier by far.]

That would be fine, if you wish. However, you should be aware that there is nothing I would tell you in private that I would not be willing to in public.

[In other words, he might not consider you any kind of active threat, but he doesn't trust you, either. That privilege is reserved to Konoha shinobi and their allies, with precious few outsiders.]

And if it is Root you wish to know more about....[there's that old plastic smile again, from their first meeting]

I'm afraid I am physically incapable of telling you. [And to highlight his point, he opens his mouth to reveal the seal on his tongue.]

Someone like me has entirely too many secrets, you understand. It must be ensured that they die with me.