- Gentle and indecisive personality - Tends to let things slide (except for criminals, obviously) - Honestly scared of her team members (especially Soohyun and Choco) - Can't say what needs to be said at the right time - Clumsy because she's worrying about everything - Incredible stats, focus, reasoning, and judgment as an Inspector - You wouldn't think she'd get along with Deokgae, but they complement each other surprisingly well - Team leader of the Mystery Investigation Team, female, Inspector - Profiler

- Lived his whole life dreaming of being a cop - Really loves working - Tells others to hand over their work if it's too hard (but everyone has a strong sense of responsibility, so they rarely do) - Lives a proper life, strict self-management - Inspector, male - Has known Soohyun the longest, so they are stable together - Good with machines

- Lives life saying everything he wants to say - Emotions are fully visible on his face; disgust is the default in front of criminals - Extremely happy when leaving work on time - Finds it fun when Sergeant Rather causes trouble - Shows up in messy tracksuits unless it's an official event (does it even more because he knows Choco hates it) - Treats criminals who spill everything under blunt interrogation according to his true personality, but treats difficult ones with utmost sincerity (kind and gentle to the point people wonder if he's a different person) - Became a cop under pressure, but that doesn't mean he hates being one - Inspector, male, Orator

- Sensitive - Keeps work and private life strictly separate - Caffeine addict - Doesn't use informal speech; low tension; investigates quietly - Has a habit of predicting others' actions internally; gets very flustered inside when seeing Sleepground and Rather's decisiveness - Hates emotional stuff - Has great synergy with Rather, so they are often paired up - Uses informal speech when excited; was wary at first but has softened up a bit now - Occasionally just uses informal speech - Smiles as leisurely as possible when a crisis occurs - Sergeant, male, Encyclopedia

- Tries to relax his expression, but his brow is constantly furrowed - Full of worry and anxiety, lacks confidence - Uses a motorcycle during investigations, public transport otherwise - Calls Sleepground 'Noona' even during investigations, but neither of them notices - Finds Choco's way of speaking scary but trusts him as a colleague; likes that his recent tone isn't as sharp - Moves well only when given instructions, but enters places that seem dangerous without hesitation - Sergeant, strong-armed enforcer

- So silent you'd think he's practicing a vow of silence - Only afraid of his grandmother - The youngest who works most efficiently - Used to say things that shouldn't be said without filtering, so now he just thinks them - On very good terms with his 'Senses' - Constable, Sixth Sense, male - Thinks the team consists of: 2 timid people, 1 meddler, 1 jerk, and 1 crazy person