There's a moment of silence on Alice's part, but then she raises her shoulders up into a shrug at the thought of whether or not said aliens are troublesome. Honestly, Alice is well aware that her own definition of troublesome stretches a little bit beyond what any average person would call troublesome, so it's probably something Rui will have to determine for herself.

"Oh, have you never seen a.. spaceship before?" That's what the things aliens use are called, right? Alice.. thinks? She was assuming those must exist in Rui's world too, if there are casually aliens around. "This train is slightly like that. It's just a lot more recognizable than a spaceship."