Board Thread:Questions and Answers/@comment-32240549-20170609013125/@comment-31888958-20170730143855

I felt sorry for killing almost everyone.

Toriel because before you killed her, she loved you and wanted to protect you from all the dangers of the underground.

Papyrus because he's such a funny character and he believes that you can get better even though you're a frickin genocidal psychopath.

Undyne because all she wanted to do was be the heroine and save the day so you won't harm any more lovely characters.

Mettaton NEO because he just wanted to make everyone happy.

Asgore because... eh... actually I don't feel sorry for him.

Flowey because he offered his frickin' soul and he begged Frisk to not kill him. Also because his death animation, going down blow by blow, is pretty gruesome.

I don't feel sorry for Sans either, because of his starting surprise attacks that actually caught me by surprise the first time I encountered him and because he murders you after you spare him.

Chara can go burn in the core of earth for eternity.