[Truthfully, there's not much difference, as noisy as his head is prone to getting. Leopold speaks in his father's voice, after all. It fits right in with some of the worst of it.]

Agent Romanoff.

[He offers the name almost before Daisy finishes asking the question.]

She's been here almost as long as I have. She understands what's at stake.

[And then his eyes shift as he looks away from her and addresses the door. There's no one there, but that doesn't mean she's not listening. Natasha doesn't let herself be seen unless she wants to be. He raises his voice to be clear that he's addressing her.]

She also has a habit of keeping tabs on me even when I've not done anything wrong.

[He doesn't expect a reply. Why confirm his suspicions? It's equally possible that he's just gone a little paranoid, all things considered.]