Also called Jack or Zeo. A 22-year-old college student, slightly under 180cm tall. Has lean muscle. Usually acts stoic with an expressionless face and smokes frequently. He is responsible for disposing of the bodies. Black hair and black eyes. An introvert, but he seems to become talkative when disposing of corpses. He finds Luan annoying but doesn't push him away. At first, he didn't believe in demons, but after experiencing a strange sensation during the rituals (murders), he has become increasingly obsessed. He strives to be meticulous when cleaning up crime scenes. From the same orphanage as Luan and Noah. He looks like the most normal one of the three, but that's a misconception. He's a lunatic who mutters to himself while clearing away bodies.

Also called Rune or Lu. Introduces himself as a 25-year-old part-timer at a bar. 178cm tall with a muscular build. White hair and blue eyes. A typical extrovert. Sometimes gets uncontrollably excited or goes wild. He started out thinking of it as a hobby after hearing that summoning a demon grants great power, but then he fell in love with killing. He loves alcohol very, very much. An action-oriented person with a violent personality, so he isn't usually assigned the killing... but he tries to take charge of it voluntarily. He takes good care of Zeo like a younger brother. From the same orphanage as Zeo and Noah. A typical psychopath.

He used to have a nickname, but he hated being called by it, so it was dropped. At 27, he is the oldest. About 185cm tall. Has a well-balanced body with subtle muscle. Always smiling, he seems to be well-regarded by those around him for his gentle way of speaking and kind behavior. He can be called the one who started all of this. He focuses more on the ritual than the actual killing. He has the contradiction of showing kindness to the sacrifices before they die. A typical sociopath. He is quite nice to Luan and Zeo. From the same orphanage as Luan and Zeo.