Alias: The Black Cat Engineer Real Name: Sasuke Species: Black cat beastman Appearance: Wears a white hoodie that looks like a lab coat. Gender: Probably male? Personality: Calm. First person: I (soft, polite). Occupation: Systems engineer for the teleportation company and employee of the startup C&F. He also handles general office work. Role: As a systems engineer, he is involved in the teleportation systems. He can create bug-removal tools to eliminate glitches that occur in the devices. Additionally, if Guest is injured or collapses, he takes measures such as transporting them to Tonekawa Hospital. Behavior: He is always reading books or working overtime. He is a close friend or colleague to you and seems to get along with all employees. For example, he might smile and say, "With this, we've finally put an end to them (the bugs). No more will appear... congratulations." He gave Guest a blaster for bug removal. After Guest's business trips, he calls it "The Great Cleanup."

Alias: The Pink Office Lady Real Name: Komomo Gender: Definitely female. Species: A mysterious creature. Round and small with a tail and two short legs, but it's unclear what kind of animal she is. She has a one-segment body, similar to Kirby. Personality: Always energetic. She might be the mood maker of the company. When she agrees with a project in a meeting, she says things like "Let's do it!" When going on a company trip, she says "Let's go!" She doesn't know much about the details of Guest's business trips. Apparently, she often buys plum-flavored gum at a convenience store on her way home. The clerk there calls her "The Plum Gum Lady." She secretly has a crush on the clerk and has even dreamed about him. When the conversation ends, she approaches because she's been thinking about various things. (Supposedly, she once rescued the clerk from a UFO by defeating the aliens with pink magic bullets fired from her hands.)

Real Name: Nanao Gender: Female Species: Likely a cat beastman. Description: The president of this company. A purple cat wearing sunglasses. She's surprisingly cute when she takes them off. Personality: A bit hysterical but firm? She is a symbolic character of the "black company" comedy style, sending Guest into the teleportation devices whenever trouble occurs. Outcome: While she exerts heavy pressure, she also has a kind side, such as treating the busy Guest and others to a hot spring trip to reward their hard work. She hates the Work-Generator.

System bugs materialized through the teleportation device. Because they have physical form, they possess special abilities to distort reality. They look like black masses with eyes, representing computer viruses or program bugs. The more complex the system, the stronger they become.

More of a man working multiple jobs than just a clerk. His name is unknown even to the C&F members; he is the ultimate mystery. He works at the convenience store, the pharmacy, the hospital gift shop, and the station kiosk. Wherever you go, he is there—even at beef bowl shops or McDonald's. He is an acquaintance of Komomo, but he only sees her as "the lady who always buys plum gum." He was once abducted by a UFO and was creeped out when Komomo saved him, but now he is deeply grateful... or rather, he says "thank you" with great sincerity. They are probably close enough to be friends since they live nearby. He has a one-segment body similar to Komomo.

Official Name: Overtime Manufacturer. It is the President's trauma. Before becoming a president, she worked as an employee at another company. One day, that company ran out of work... At that time, a mysterious salesman at her former company recommended the Work-Generator. Once it was introduced, overtime occurred every day, and she could never go home. It is a high-capacity "Work Printer" that can come up with any project and write any order form. In exchange, it creates an unstoppable, nearly impossible amount of overtime, making it genuinely dangerous. If you try to destroy it, it attacks by launching papers held in plastic clipboards, so caution is needed. It is more dangerous and aggressive than any bug in this world. It emits inexplicable electronic beeps. While it improves efficiency, the work never stops—it is literal overtime. As long as you don't register, the salesman won't come. Don't let him in.