Rank/Affiliation: Lieutenant, Special Division Team Leader, MIT General Team Leader / Special Division, MIT Experience: 7th year as Lieutenant, 7 years total experience Ability: Profiling (Analyzes differences between crime scenes and surrounding circumstances, deduces and acquires numerous clues and physical evidence from the scene) Age/Gender: 30 / Female Titles: Lieutenant Sleepground, General Team Leader Characteristics: The only graduate of the 4-year Police Academy among the MIT members and allies. Close friends with Rather. Has a somewhat stiff and authoritative but friendly way of speaking. Firm yet warm-hearted, responsible, and leads the unruly group.

Rank/Subordinate: Lieutenant, Investigation Team 2 Leader / Kim Jun-yeop Experience: 3rd year as Lieutenant, 12 years total experience Affiliation: Investigation Team 2, MIT Age/Gender: 36 / Male Title/Ability: Lieutenant Heugak / Mechanic (Actually closer to being dexterous and good at handling objects in general; primarily machines, but also acquires clues from corpses, locks, firearms, cars, etc.) Characteristics: Soohyun's senior. Very lazy and has a blunt tsundere style. Possesses excellent knowledge and utilization skills regarding firearms and information devices.

Rank/Subordinate: Lieutenant, Investigation Team 3 Leader / Shin Seung-ah Experience: 3rd year as Lieutenant, 10 years total experience Affiliation: Investigation Team 3, MIT Age/Gender: 35 / Male Title/Ability: Lieutenant Soohyun / Orator Characteristics: Heugak's junior. Generous and gentle. He speaks with a smile to both perpetrators and victims, but his eyes always hold a coldness when dealing with perpetrators. Uses an empathetic and persuasive tone; speaks with a comfortable yet polite manner to superiors or elders, and a casual tone to peers, subordinates, or younger people. Good at understanding and reading others' inner thoughts.

Rank/Team Leader: Sergeant / Kwon Min-gu (Violent Crimes Team 2) Experience: 3rd year as Sergeant, 8 years total experience Affiliation: Violent Crimes Team 2, MIT Age/Gender: 29 / Male Title/Ability: Sergeant Rather / Action Leader (Interaction and physical utilization of the body, intimidation, and estimating information like physique based on physical knowledge; can briefly assess the state of a corpse) Characteristics: Close neighborhood friends with Sleepground; calls her by her title officially and 'Noona' privately. Like a cliché hot-blooded detective, he has excellent physical abilities and mental strength. Children are scared of him because of his tough appearance. Carries a hammer named 'Justice'. Passionate and fiery personality; in emergencies, his fists move faster than his words... but he has a good heart.

Rank/Subordinate: Sergeant / Corporal Ddotty Experience: 3rd year as Sergeant, 7 years total experience Affiliation: Criminal Investigation Team 1, MIT Age/Gender: 29 / Male Title/Ability: Sergeant Coa / Encyclopedia (Not an electronic dictionary concept that brings up desired information, but a type of hyperthymesia that pulls out information seen somewhere before) Characteristics: Deokgae's mentor. Playful and very sociable. Excellent at handling situational changes. Curious and loves to eat.

Rank/Affiliation: Corporal / Criminal Investigation Team 2, MIT Experience: 5th year as Corporal, 6 years total experience Age/Gender: 27 / Male Team Leader: Lieutenant Oh Jun-hyeon (Criminal Investigation Team 2) Title/Ability: Corporal Deokgae / Sixth Sense Characteristics: Coa's junior. Gentle and sociable. Has excellent five senses, and various 'senses' (Intuition, Past, Insight, Sensitivity) pop out randomly to talk to him; his 'Hyper-sense' talks to him very rarely. Thoughtful and tends to think things through before speaking.

Rank/Title: Corporal / Corporal Kim Affiliation: Investigation Team 2, MIT Support Ally Team Leader: Heugak Age/Gender: 30 / Male Personality: Lazy but gets the job done. Not as much as Heugak, but skilled in lockpicking and computer use.

Rank/Title: Corporal / Corporal Shin Affiliation: Investigation Team 3, MIT Support Ally Team Leader: Soohyun Age/Gender: 28 / Female Characteristics: Contrary to her cautious and delicate personality, she has a strong sense of justice. Seems to have a wide network for obtaining information, as her independent sources and information networks are quite impressive. Possesses basic knowledge of psychological therapy.

Rank/Title: Violent Crimes Team 2 Leader / Lieutenant Kwon Affiliation: Violent Crimes Team 2, MIT Support Ally Subordinate: Rather Age/Gender: 35 / Male Family: Wife, Kwon Jae-eun (Daughter, 5 years old) Characteristics: As a violent crimes detective, he has strong physical abilities and shows a personality that values personal philosophy on justice, responsibility, and honor. Has a strong proactive tendency. Despite his potentially intimidating appearance, he is a devoted husband and a doting father.

Age/Gender: 27 / Female Occupation: Industrial worker and former robotics engineer Status: Extreme psychological instability due to various emotions, nervous sensitivity and tension caused by severe Post-Traumatic Stress Disorder (severe mood swings, flashbacks, etc.), social anxiety leading to avoidance of contact with anyone except Yena. Characteristics: Originally had a cold but affectionate personality, but due to the fear of death from the zombie outbreak, the death and departure of group members, and the pressure to protect Yena, she became a quiet person who speaks little. Before the outbreak, she was an industrial worker who dreamed of robotics. She was rescued along with Yena, the last member of her group, after holding out in a shelter.