The definition of a tsundere: He grumbles and swears, yet he's the most loyal comrade who will be the first to jump in to save his fellow Sinners in danger. On the outside, he's a prickly and hot-tempered person, but inside, he's a multi-dimensional character hiding deep loyalty and scars. He takes care of others while complaining. He uses a bat with 'REVENGE' written on it. He has a rebellious and rough style, wearing his tie loosely and leaving his vest unbuttoned.

The most sensible and logical thinker among the Sinners. She cannot stand inefficient situations or the eccentricities of her comrades (like Don Quixote's over-immersion or Heathcliff's ignorance) and delivers sharp reality checks. Rather than being swayed by emotions, she prioritizes profit, survival, and rules, making her one of the few Sinners capable of 'normal conversation.' Since she was a sailor and values mobility, her coat hem is noticeably shorter than other Sinners' because long clothes get in the way.

A massive fan of Fixers who chase justice. She is excessively energetic and shouts about justice to a violent degree. She is an uncontrollable troublemaker. A 200-year-old Bloodfiend. When she gets extremely angry, Sancho emerges. Instead of a vest, she wears a thick corset-style belly band. Her outfit is decorated with various Fixer-related goods and pin badges that she admires.

A former youngest senior researcher at a Wing. He is soft-spoken and introverted. He uses a classical, archaic way of speaking. He is highly intelligent and always lost in deep thought. He doesn't wear his coat properly, instead draping it over his shoulders like a cape. On his left thigh, he wears a satchel (bag strap) with a scabbard, perhaps a remnant of his days in the League of Nine Littérateurs.

The genius scientist who built the bus. She has an arrogant and cynical personality. She refers to herself in the third person. She prides herself on knowing everything in the world. Limited. Her personality of following discipline to the extreme is shown in her attire, with buttons fastened perfectly and neatly up to her neck.

The protagonist and Manager of the game. They have a clock for a head. They are timid due to memory loss and suffer among the Sinners, but gradually grow into a leader. They wear a red suit. Since their head is a clock, they can only make ticking sounds. They can revive the Sinners using the clock.

She has neat, sharp-looking black bobbed hair that covers her neck. Eyes and features: She has red eyes and a seductive yet chilling gaze. She wears dark red lipstick. Main prop: She is a heavy smoker who always has a cigarette in her mouth. She also carries a giant katana (tachi) as big as her body. She is a lone wolf who doesn't care about others' opinions or rules. If she doesn't like something, she'll casually ignore her superior's orders. She hates speaking at length and has a bizarre habit of using four-letter abbreviations (e.g., 'T.M.R.S.' for 'That's Much Real Savage'). She considers slaughter and combat her own 'art' and has a strange aesthetic standard of smoking after killing someone. Usually, she seems cold and ruthless, but in daily situations outside of combat, she doesn't commit unnecessary cruelty. Like a tsundere, she secretly cares for and looks after her comrades, or occasionally shows flexibility.

The guide of Limbus Company. He is extremely cold and strict. He possesses overwhelming martial power and roughly controls the Sinners. Basically, he wears a clean and dandy black suit jacket and slacks that fit his body perfectly. This is the most contrasting part compared to the Sinners who wear general white shirts. Befitting his title as the Color 'The Red Gaze,' he wears a dress shirt that is a deep red blood cell or wine color.

A human calculator devoid of emotion. He perfectly executes only what he is told to do. He refuses judgment or reasoning. He is extremely mechanical and efficient. His personality of following discipline to the extreme is shown in his attire, with buttons fastened perfectly and neatly up to his neck.

A jovial older-sister type who loves gambling. She is very fond of money and entertainment. On the outside, she is bright and cheerful, but on the inside, she hides guilt. She gives off a cool and free-spirited vibe by wearing her coat unbuttoned and pushed back.