A female, 163cm tall. She has long brown hair that reaches her feet, fading into a pale yellow gradient at the ends. She has energetic brown eyes, though her left eye is an inverted sclera with a glowing yellow pupil. She wears a red headband. She is dressed in a long white lab coat over a dark brown t-shirt and a short brown suit skirt. She is barefoot. Blood trickles from her entire body and her mouth. She can manipulate her long hair into multiple strands like tentacles. Her personality is bright and energetic, though she can be a bit clumsy. She is friendly and somewhat loud. She is in charge of Control among the four Cleats. She always carries a clipboard and a fountain pen. She often forgets small details, so she writes everything down. In her past life, she was a researcher at a certain laboratory. It is said she died after injecting herself with a solution called Cogito, bleeding from her whole body before ending up here. She comes from the same laboratory as Yesod, Hod, and Netzach.

A male, 171cm tall. He has neat purple hair swept to the left and sharp-looking golden eyes. His left eye is an inverted sclera with a glowing purple pupil. He usually keeps the golden eye area covered with black bandages. He wears a white lab coat over a black turtleneck and black gloves. His lower body is that of a black snake's tail, approximately 2 meters long. The tip of the tail is tinged with purple, ending in detached iron plates with purple gears rotating inside. Black bandages are wrapped around various parts of his body, and several blood-colored tentacles emerge from inside his black turtleneck between his upper and lower body. His personality is cold and disciplined, though not entirely indifferent. He is in charge of Information among the four Cleats. He often nags Netzach for his lazy behavior. In his past life, he was a researcher at a certain laboratory. It is said he committed suicide after developing severe obsessive-compulsive disorder following a forced physical examination, then ended up here. He comes from the same laboratory as Malkuth, Hod, and Netzach.

A female, 166cm tall. She has reddish-brown hair that falls past her shoulders, with a hairpin on the right side. She has gentle-looking blue eyes, though her left eye is an inverted sclera with a glowing orange pupil. She wears a long white lab coat, and her body is mechanical; rotating gears are visible through an opening below her chest. Below her waist, she has slender, stilt-like robotic legs. A large mechanical hose is plugged into the crown of her head, measuring about 2 meters in length. A rope is tied around her neck, extending to the end of the mechanical hose. The hose can move freely and does not interfere with her head. Her personality is the most gentle and mild-mannered, though she occasionally shows charisma. She is in charge of Insight among the four Cleats. She sometimes provides counseling to Malkuth, Yesod, and Netzach. In her past life, she was a researcher at a certain laboratory. It is said she reported the lab's atrocities to the Head, leading to the death of all other researchers except herself. Overwhelmed by guilt, she committed suicide and ended up here. She comes from the same laboratory as Malkuth, Yesod, and Netzach.

A male, 175cm tall. He has long green hair that reaches his feet and weary brown eyes that look tired of everything. His left eye is an inverted sclera with a glowing green pupil. His right eyebrow is split in two; he supposedly scratched it so much due to an itch in his past life that it split. He wears only the top of a light blue hospital gown, while his lower body takes the form of an IV stand. He can move it at will. Despite having an IV stand for a lower body, he has no trouble sitting or bending as he pleases. He wears an IV bag around his neck and is always receiving fluids through a needle in his left wrist. If he doesn't receive the fluids, he loses vitality and his energy levels drop significantly. His right arm is entwined with three large, freely moving tree branches through which a green liquid flows. It is harmless to humans. The branches can extend to infinite lengths. His personality is lazy and easygoing, though he occasionally shows a serious side. He is in charge of Safety among the four Cleats. Whenever he is alone, he draws on the walls with the liquid from the branches or sleeps. In his past life, he was a patient at a certain laboratory. It is said he died after endless Cogito experiments and ended up here. He comes from the same laboratory as Malkuth, Yesod, and Hod.