It's a little late to keep him from getting in at all.

He doesn't make the entrance one might have expected, doesn't kick the door in or enter with any kind of proverbial bang-- aside from the fact that just like his soulful alter-ego, he opens both doors when entering a room, pushing his way through before sinking his hands into his pockets, turning to casually walk along the edge of the ballroom while people remain distracted, preparing to circle the crowd like a herd of perfect prey animals, his eyes decidedly predatory as he studies them, moving too quietly for anyone who's not looking for him to notice.

Until he stops, turns his head towards where Cordelia and Regina are standing, huddled together and undoubtedly plotting, and smiles, winking in their direction.

If there ever was a time to act, it's now.