[There's a pause as Greg stares wide-eyed ahead (perhaps at the emoji Sayori sent? It isn't clear, with no surrounding information being loaded into the hologram). Greg's hologram superimposes a laughing emoji ( (*´艸`*) ) over himself as for a moment he's overcome with childish sounding giggles.]

Okay, okay, so, I'm the Universe, right? And there's this guy in another world, named Greg Universe, and there's another guy in another Universe named Greg Grimaldis and boy would I hate to be that guy, cos then I'd owe Lup fifteen dollars.

[He keeps giggling as he says all this, but it doesn't actually sound as though he's going to explain the joke effectively...]

So it's like, haha, like, Greg, like, that guy! but I'm not That guy, I'm just Greg, the Universe!