He knows how difficult this must be for him. Just because V is the human parts of Vergil doesn't mean that he's particularly adept at being honest, or forthcoming, or feeling feelings... cuz Vergil fucking sucks at those too. Nero does try to make the same approach work, listening quietly, giving him the time to get out what he wants to say.

He at once does and does not need the acknowledgement that whatever V is to him, it doesn't take away from Vergil. In fact, he finds himself deeply, deeply relieved to hear it. These are anxieties he didn't even realize he was feeling, but giving them a name has made them suddenly far more intense and looming in their dread. The last thing he wants is for some kind of spat to form between the two. Wouldn't that affect something, logically? Would V becoming angry or upset with Nero translate over to Vergil's feelings, too? He's barely found his father (and his shadow), the last thing he needs is to alienate him (or his shadow.)

Nero waits until V seems to be done speaking. Mercifully, he doesn't leave him hanging to sit there and wonder if what he said was being accepted or rejected.

"Yeah." Okay, it isn't the most in-depth response, but he does at least elaborate a bit. "You're right. I don't... know what we are, but I know we're not nothing."

He glances over at V. "You're not nothing. We'll... see what happens, I guess."