I don't think I adequately conveyed how much Flowey scared the life out of me when he transformed - I thought I was in a tutorial, I wasn't really paying much attention, and then suddenly... that evil face and the shaking text... my hand had reflexively gone to Alt+F4, which fortunately/unfortunately did nothing! Just after that, I was pretty uneasy about... not Toriel specifically, but really anything that this game was going to do - especially in that long walk with the appropriately-named scary music playing.

Toriel definitely isn't evil, but I wonder how innocent you could truly call her... she honestly believes that keeping the human in her home is the best for her, not even considering that she might want to go back to her real home, but she knows from the start that she's going to do that without telling the human and reacts to the request to leave by attempting to seal off the exit forever.

It's odd that she leaves the player alone suddenly after babying you through three puzzles, although I suppose she did say to wait for her rather than trying to go off on your own... still, it's a sudden change from her very protective attitude up until then for the sake of baking a surprise pie, and nobody who's ever played any game before is really going to spend even a moment sitting there.