[He's keeping up the pace just to be an ass, but he will slow down if Leo starts to fall behind... it's just nice to feel superior to someone else, y'know? But he can't show off his cool robots if he really does leave Leo in the dust, so he'll remain conveniently within conversational distance even if he's making it difficult.]

Ah, I suppose I should dumb things down a bit for you, shouldn't I...? [add you literally just used a bunch of words that don't exist outside your own world does this even count] Dynamo is the name of my machines, Behemoth is this place we're in—half of it, anyway. I don't know where the train stuff comes from. Since it's a place built partially from my memories, you could say I'm at an advantage when it comes to navigating it, kukukuku. Without me, this place would no doubt eat you alive, so be grateful I'm even bothering with a useless person like you.

As for Dynamo... I could try to explain it, but it's probably beyond your understanding. Just know that Dynamo is an advanced machine that I built myself. They're as much a part of me as my own arms or legs. [he's all puffed-out with pride, too, having pushed back his more anxious thoughts for now. he's really cool, right? please think he's cool. not that he cares if leo thinks he's cool... (he totally cares if leo thinks he's cool)]