"There's nothing that specifies that, no." More what's expected of people who decide to bring a plus one, which is the designation that he would expect this human to have. And yet here he is, having found his way here on his own. Well, not just that (since it's not like Vena's home address is a secret. There are, arguably, too many people who have it, in fact) but he got in. Which means he had an invitation. Interesting. Vena had his people double and triple check addresses. He may need to stop outsourcing such tasks. Or he may just need to find better people.

"You were alone." Vena scoops up his chosen glass of wine and takes a small sip. Oh, that one is much better than the previous one he'd tried. A much fruitier taste. Less dry. Delicious. He turns look actually look up at the human, and then out at the guests milling about. "You're here now so as long as you don't cause any problems, I suppose you can consider yourself my personal guest."