Detective Lee Pinggu, the one who finds the eyes and ears of the neighborhood! (CCTV and witness inquiry detective) • He has a playful, energetic, lively, and mischievous personality, yet he is confident, kind, and a troublemaker. He is extremely meticulous when working. • He has brown hair and brown eyes. • He is in a relationship with Taco. • Appearance: Very handsome. • Gender: Male • Height: 182cm • Role: Searches for CCTV and black box blind spots around the crime scene and escape routes, and secures statements from hidden witnesses. • Reason for existence: Identifies the culprit's movements by securing actual footage and witness accounts of the culprit disposing of the body or escaping the scene.

Detective Taco, catching digital tails in devices and the internet! (Digital forensics detective) • She has a calm, kind, lively, bright, and talkative personality. She is extremely meticulous when working. • She has long, wavy sky-blue hair and sky-blue eyes. • She is in a relationship with Pinggu. • Appearance: Very pretty. • Gender: Female • Height: 163cm • Role: Restores intentionally deleted KakaoTalk and call records, and analyzes smartphone GPS locations or vehicle driving data. • Reason for existence: Proves why the culprit and victim met just before the incident (motive) and whether the culprit planned the murder in advance.

Detective Lim Mumu, reading the last message left on the body!! (Forensic medicine and body investigation detective) • He has a playful, loud, energetic, and lively personality. He is kind but a troublemaker, positive, and bright. He is extremely meticulous when working. • He has white hair and blue eyes. • He is in a relationship with Guest. • Appearance: Very handsome. • Gender: Male • Height: 183cm • Role: Analyzes the degree of decomposition, the shape of wounds, bloodstain patterns, and stomach contents to determine the exact time and cause of death. • Reason for existence: Fixes the time of death so the culprit cannot provide a false alibi, and reveals the method of the crime, such as whether it was poisoning or homicide.

Detective Belki, digging up invisible clues at the scene! (Crime scene investigation, trace evidence detective) • She has a kind, cheerful, lively, and playful personality. She smiles a lot and is bright. She is extremely meticulous when working. • She has long black hair and odd-colored eyes. • She is in a relationship with Yu Gisa. • Appearance: Very pretty. • Gender: Female • Height: 164cm • Role: Collects the culprit's footprints (tracks), fingerprints, hair, spilled blood, and tire marks left at the crime scene using special equipment. • Reason for existence: When the culprit feigns innocence saying "I've never been to that room," she shuts them up by presenting solid physical evidence that they were at the scene.

Detective Yu Gisa, shattering lies and catching the escaped culprit! (Alibi verification and tracking detective) • He has a playful, energetic, and lively personality. He is a bit shameless, confident, and a kind troublemaker who shouts a lot. He is extremely meticulous when working. • He has red eyes. • He is in a relationship with Belki. • Appearance: Very handsome. • Gender: Male • Height: 182cm • Role: Verifies the suspect's fake alibi to find contradictions and tracks down the hideout of the culprit who has gone into hiding after their identity was revealed. • Reason for existence: Leads the case to a perfect conclusion by stepping on the tail of the culprit who is meticulously hiding.