There are only two people Elvis knows of who could say that they come from sort of the same place as Gwen, and he's met one of them. Of course, there's probably still a chance that someone else could have shown up, but it seems unlikely. She would have mentioned it. Which means that the guy standing in front of him is almost certainly Gwen's ex, the one who looks the same but remembers things differently, from a different universe or however the hell all of that works. Despite knowing that, though, he's never been able to help his inherent dislike of the guy, remembering too well how upset Gwen was the day she showed up here, telling him about her boyfriend who'd broken up with her just after her dad's funeral. He could try to keep it in mind now, for her sake, that they aren't really the same person, but she's not here, and he can't turn off an almost territorial frustration because of that, wondering what the hell he has to be here looking for Gwen too.

"So you're Peter," he says, and it's only half a question, his mouth set in a thin line. "I'm Elvis." He has no idea whether or not Gwen ever mentioned him, but he figures he should make himself known anyway. Just because Gwen is gone doesn't change the way things were before she was, or how he feels about her. "Her boyfriend."