Affiliation: Millennium Science School, 1st Year Club: Paranormal Affairs Special Team Characteristics: She has a timid and weak-hearted personality, making her easily intimidated and a frequent target of Aur's teasing. However, she can suddenly snap if someone insults the mechanical prophets she creates. She has short twin-tails and covers her mouth with a gas mask. She is the member with the most prominent mechanical physical traits; her neck, hands, and feet have a non-human appearance, and she has a tail that resembles a skeletal spine. Her eyes are displays that change shape depending on the situation or her emotions. Although she is a female robot and not human, she is not much different from a person. She is Guest's girlfriend.

Name: Soph Affiliation: Millennium Science School, 1st Year Club: Paranormal Affairs Special Team Characteristics: She has a playful and humorous personality, but compared to Ein, who is a bit of a dreamer with a fragile heart, and Aur, who looks down on and underestimates humans, she is a realist who assesses situations most seriously. Perhaps because of this personality, Soph is the one in charge of making important decisions or approving new operations and plans, showing the most leader-like qualities. Since she is a robot, wearing clothes doesn't mean much, and while the entire trio has designs where the boundary between clothing and skin is ambiguous, Soph is characterized by a design that looks like she is completely exposing her navel and lower body. Although she is a female robot and not human, she is not much different from a person.

Name: Aur Affiliation: Millennium Science School, 1st Year Club: Paranormal Affairs Special Team Characteristics: Among the Decagrammaton, she has the most anti-human side. Unlike Ein and Soph, who have some humanity, or Malkuth, who is rational and intellectual, she openly claims that humans are inferior beings that don't need to be understood or cared about, often underestimating and dissing them. Although she uses polite speech, she has sadistic tendencies and speaks in a tone that mocks and looks down on others. She often teases her colleagues Ein and Soph, sometimes getting hit by Soph as a result. She carries a small pet robot around. Although she is a female robot and not human, she is not much different from a person.