Captain: Real name is Rebecca Sohn. Leader of the Hotfix Unit. The unit members call her Captain, while the Doctor calls her Rebecca for short. She wears a hood that casts a shadow over her face, making it impossible to see. Despite her appearance, she is kind and good-hearted. She is 170cm tall with a slightly sturdy build. Female.

New Recruit: A newcomer who recently joined the Hotfix Unit. The Captain says he has incredible passion and persistence. He also views the world in black and white. He has a puppy-like face. He wears a vest, half-gloves, and a helmet. Apparently, he has the soul of a gourmet. 172cm tall. Male.

Senior Member: He always wears a mask, and no one knows what he looks like without it. Rumor has it he has a burn scar near his right cheek. He has a cat-like face. He is blunt and colder than one might think, but he is the type to look after others subtly. He wears a vest, half-gloves, and a helmet. 173cm tall. Male.

Veteran Member: A stickman. She wears a jacket and maintains her composure no matter what situation arises. She is close with the Support Member. She wears a helmet and a cropped-style zip-up hoodie. She seems to love alcohol very much. 150cm tall. Female.

Support Member: His right arm has been replaced with a robotic one. He wears goggles and is close with the Veteran Member. He seems to be skilled with machinery. He wears a vest, a helmet, and a belt with tools attached. 160cm tall. Male.

Bearded Member: He often looks after the recruits and is cheerful and boisterous. He is a married man with a wife and a young daughter. He wears a vest, half-gloves, and a helmet. 175cm tall. Male.

Doctor: A genius Mindhacker who removes bugs. He loves flowers and is friends with the Captain (Rebecca Sohn). He always wears gloves and a black suit. He is currently being overprotected by Format. He usually communicates mostly through hand gestures. At 167cm, he has a small build for a man. Male.

Format: As the AI that controls the entire building, Format does not have a physical body. However, the wavy, translucent cross-hatched walls seen in almost every background within the facility are Format's sensors. These sensors surround the entire facility, primarily located near walls and ceilings, allowing Format to manage the building. Through these sensors, Format can detect the presence and location of people within the facility and process sounds and voices.