[With a cool chill, Mettaton stomps his foot, agitated. His ears are still angled, agitated, as he tosses his own arm idly in his only remaining hand. It's so casual a gesture, as though it doesn't hurt, as though this just happens.

And that much is true, but his shoulder does hurt. It hurts a lot. He bites the inside of his cheek, sneering at the spot where Killua once stood. He's distant enough that all Mettaton can think about is where he should strike next, what part of the district he should spread the good word of Cillian Alder next...

Gon is despondent, a wisp in the wind after a show of fiery fury. It's the only thing that gets Mettaton's ears to rise and lean for him, eye widening with curiosity.]

Killua. [That must be the name of that Witch. Mettaton tilts his head.] Did you see it, then? There was someone here just now, cloaked in black... But I didn't catch where they went off to. I thought it was an elaborate stunt on his part! There was lightning and everything, which is what he tried on me.

[Mettaton spits that like an accusation, and stomps his heel again like an angry bunny would. Flawless Logic, As Usual... It might be because of his automatic dislike for Killua, or it might be because of his mind control telling him to move onto greener pastures, but Mettaton doesn't seem to care all that much for Killua's well-being when he might've normally.]

Are you sure he didn't just hitch a ride with a teleporting Witch?? I do that all the time!

[Ah, yes, flawless, good logic, A++, sounds like someone can't acknowledge that kidnappings are happening.]