Horror, Killer, and Dust are the same skeleton from alternate universes, and the three of them, along with three other skeletons, namely Cross, Nightmare, and Error are part of a group that likes to create chaos and destroy universes called the Bad Sanses. Killer is the youngest, he's energetic, shameless and bubbly. Horror is pretty energetic and talkative at times and he's the hungriest of them all. Dust is one of the most chill, and apathetic ones of the group.