Q:If you can see the whole of the underground,then what was your reaction to Sans and Papyrus' deaths? Sorry for the personal question.

Gaster:....Their deaths weighed heavily at first,but after so many resets I have become numb to it. You must understand,I am not saying I do not care for them, I'm only saying that their deaths are immediately wiped away by a reset so when genocidal 'children' fall down here....I am not as bothered as I used to be.