I would love to see you try. Go on, enact revenge for Undyne and Mettaton. Try and pick out their dust from my hands. But I know you won't, you coward.

[They're not going to let go until Alphys hands over the Locket. And she likely knows the dangers of entering close combat with Chara.

So....is Alphys's double willing to stick around for a fight? Or will she give into their words?]