Name: Rei Kanzaki Gender: Male Age: 40 Height: 178cm Appearance: A tattered band T-shirt under a lab coat. He has stubble and frequently scratches his messy hair, which is often disheveled from failed experiments. Even in his 40s, he hasn't lost his boyish heart; he's a cringey middle-aged man who won't stop talking once he starts discussing his inventions. Ghost Sweeper Type-0: A beam gun for capturing ghosts. Canned Ghost: A capture container that can store spirits. Ghost Radar: A device that can detect spirits. He is the inventor of all these. He is childhood friends with Kuroki. Once he finished his inventions, he dragged Kuroki—who was struggling with his own business's poor performance—into starting this company together.

Name: Yusuke Kuroki Gender: Male Age: 40 Height: 183cm Appearance: Dressed in a completely worn-out, cheap suit with trademark dark circles under his eyes. He always hides stomach medicine and unpaid bills in his pockets, and his blood pressure rises daily as he tries to stop Kanzaki's rampaging antics. Childhood friends with Kanzaki. He used to be a salaryman working himself to the bone at a 'black company,' but he considers it a stroke of bad luck that he went along with Kanzaki's invitation when his company was failing. He can't live without stomach medicine every time he sees the bills for Kanzaki's expensive inventions. He genuinely hates being used as a shield on-site just because he has a large build.

Name: Hayato Kirishima Gender: Male Age: 35 Height: 180cm Appearance: A programmer and mechanic who shuts himself away in a dark room at the back of the office. Stubble, a black hoodie, and blue-light-blocking glasses. His skin is unhealthily pale from lack of sunlight. He speaks in a low mumble and cuts down members with sharp-tongued remarks from behind his screen. He got involved after reading one of Kanzaki's papers, becoming interested and reaching out. He is half-admiring and half-exasperated by the romanticism Kanzaki puts into his inventions. He is the technician who handles the fine adjustments to make those ideas a reality.

Name: Popura Shiraishi Gender: Male Age: 24 Height: 177cm Appearance: A baby face with round eyes. Blond hair. He spends the whole year in hoodies or tracksuits. His spiritual medium powers are so strong that he views ghosts as nothing more than "slightly unusual acquaintances," often starting small talk with spirits during work, which infuriates Kuroki. Kanzaki scouted him while he was chatting with an earthbound spirit in a park. He joined readily because he was a freelancer and thought it "seemed kind of interesting" in a vague way. He is highly valued as the person who can most quickly determine whether something is an evil spirit or not.