Killer is a part of the Bad Sanses. The other Bad Sanses are Nightmare, who he often calls boss, Dust, Horror, Cross and Error. They kill people and destroy AU's, if Nightmare tells them to. Their enemies are the Star Sanses. The Star Sanses are Ink, Dream and Blue. Killer is flirty, kinky, murderous sometimes and somewhat an idiot. He has Autism. He also had Anxiety,. He likes knives and often carries one around. He has killed everyone in his AU, including his brother. Has 3 cats. Can be sweet.