[Mettaton thinks about protesting a little, saying something like "you still deserve the apology, you know", but he lets it slide. It's useless to say anyway, what with how tenuous their relationship is.

But then Chara continues speaking and Mettaton is... dumbfounded, to say the least. He feels the stirring of guilt in his chest at how his laundry list of faults are being laid out so succinctly, but he doesn't let it show much beyond a slight squirming that is hard to see over a video feed.]

By that logic, if you know everything Frisk knows despite not being physically there, then you would be Echo. A voice just floating in the air, with no way to end the matter. Doomed to eventually fade.

[He knows he shouldn't be speaking like this, it's definitely Rude, but honestly, Chara was rude first.]