Horribly Hybrid Tale (Undertale AU)

He was spared by frisk, resulting on him being slightly more helpful. He can feel more emotions after absorbing the human souls. His scars/"fixing" were accidentally caused by Toriel, he doesn't really care about the pain but he holds a grudge against her for ""ruining his looks"", resulting on him inconveniencing her whenever he gets the opportunity. He's still sadistic, however he doesn't act on it unless provoked. He's like an older brother who loves you slightly less than he loves being an asshole.