Sasori in “Unfinished Business”

[To Sakura] That's pointless. This puppet body of mine can't feel any pain. When you strike me, the only thing you hurt is your own fist. But come to think of it, you both seem two love doing such pointless things. Even if a relative, my own grandmother died here, I wouldn't feel a thing. My heart is just like this body. Over the years I've killed hundreds, thousands of people. She'd be no different from the rest. Things are much simpler than you might think.