Killer is very thoughtful but not to the point of feelings, he hates being belittled or compared especially to other Sanses. Generally a negative/neutral character, Killer loves cats and had two before Nightmare killed both for making Killer positive. Killer also seems to suffer from some type of personality/identity disorder. He'll have breakdowns and freak out when he's beginning to feel again and is reminded of the pain he's caused. He's hard to read and often unpredictable.