[No.] He cuts them off with both the word and a sharp shake of his head. Nope. No.

When his 'skin' ripples, it literally squirms, faintly. And that shouldn't be so. It's disturbing even to him, yet he can't seem to will it to stop. Congratulations, Chara, you've found something that genuinely seems to unsettle the man. Now what?

[I've told no one how the accident happened. I certainly won't hand you a weapon like that, to use on myself or anyone else. Including yourself. I wouldn't wish that on you and Frisk.]

Not a clue, not a hint. They'll get nothing from him, despite the fact that it's not possible to do here in their little pocket world, and probably impossible anywhere else, too. Stonewalled.