Re: Xavier & Natasha
"Romanoff," she answered as she reached out with her own hand to shake his in a light grip. "Natasha Romanoff. I hope you're enjoying the party so far?" She'd considered, briefly, giving a false name, but there were already a number of people at the party who knew her, and it would have been ridiculous to do so. She generally saved aliases for playing parts elsewhere. After a few polite seconds, she let go of his hand and stepped back just a little so that she could study his costume.
Not being well-versed in popular culture, she didn't understand the reference, but nodded with a small smile. "Interesting choice. You wear it well."