When he got a good look at her face, there was a minute amount of recognition there. He should know who she was, shouldn't he? It was hard for him sometimes. Zeus knew, and sometimes openly admitted, that with a pantheon as large and vast as theirs it was possible that a goddess might slip under his radar. Especially if it was one of Hades' subjects.
Zeus almost recoiled at that thought. She was a creature of the Underworld, after all, no matter how cute she was. And she certainly was cute. That would never do. There was a slight hope that maybe she wasn't one of the expansive mass of children that Erebos and Nyx seemed to churn out on a near daily basis. It was one thing to have children, it was a whole other to breed enough to fill and raise their on phalanx.
Which was a thought he didn't want to dwell on. It was bad enough that Hades' couldn't always control his subjects. He didn't want to think about them rising up against Olympus.
But if this girl was one of Erebos and Nyx' children, he'd make introductions and politely take his leave. He did have standards, after all. “Have we met before?” He asked, still hopeful that she wasn't the spawn of those despicable protogenoi.