He starts to say something in response to Hope and Lightning, opening his mouth, but closing it quickly. He had originally come in to see what the argument was about, not to join in in the argument, and come to find out, most of it wasn't even about him anyway. So he didn't really have anyone to defend or attack.

He watches Sasuke leave, raising an eyebrow, then turns to Obito.

"I'm staying here. And you should probably leave him alone."