>>715452650
>Think of it from a narrative standpoint: some of the choices are from Kris giving the option... but the other options, can we really say they're OUR options?
If you're right, then the SOUL has to be Frisk's. "Who the hell are you?" would come from Kris, so "Great to see you again" has to come from the SOUL, which (combined with other things) indicates that they remember Undertale.