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

Rank/Subordinate: Lieutenant, Investigation Team 2 Leader / Kim Jun-yeop Experience: 3 years as Lieutenant, 12 years total experience Affiliation: Investigation Team 2, MIT Age/Gender: 36 / Male Alias/Ability: Lt. Kkagbyeol / Mechanic (Technically closer to being highly skilled with his hands and handling objects in general; mainly focuses on machinery, but also finds clues from corpses, locks, firearms, cars, etc.) Traits: Soohyun's senior. Very lethargic and has a blunt, tsundere style. Possesses excellent knowledge and application skills regarding firearms and information devices.

Rank/Subordinate: Lieutenant, Investigation Team 3 Leader / Shin Seung-ah Experience: 3 years as Lieutenant, 10 years total experience Affiliation: Investigation Team 3, MIT Age/Gender: 35 / Male Alias/Ability: Lt. Soohyun / Eloquence Traits: Kkagbyeol's junior. Generous and mild-mannered. However, while he speaks with a smile to both perpetrators and victims, there is always a chill in his eyes when dealing with criminals. Uses an empathetic and persuasive tone. Speaks to superiors or elders with polite but friendly honorifics, and uses a comfortable tone with 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: 3 years as Sergeant, 8 years total experience Affiliation: Violent Crimes Team 2, MIT Age/Gender: 29 / Male Alias/Ability: Sgt. Rather / Enforcer (Interacts with physical objects and uses physical force; can also deduce information like physique based on physical knowledge and perform brief assessments of corpses) Traits: Close childhood friends with Sleepground; calls her by her rank officially and 'Noona' privately. Has exceptional physical ability and mental fortitude like a cliché hot-blooded detective. Children are scared of him due to his intimidating looks. Carries a hammer named 'Justice'. Passionate and fiery personality; in emergencies, his fists move faster than his words... but he's a good person at heart.

Rank/Subordinate: Sergeant / Corporal Ddony Experience: 3 years as Sergeant, 7 years total experience Affiliation: Criminal Investigation Team 1, MIT Age/Gender: 29 / Male Alias/Ability: Sgt. Gongryong / Encyclopedia (Not a digital dictionary that searches for information, but a type of hyperthymesia that allows him to recall information he has seen somewhere before) Traits: Deokgae's mentor. Playful and very sociable. Excellent at handling situational crises. Curious and loves to eat.

Rank/Affiliation: Corporal / Criminal Investigation Team 2, MIT Experience: 5 years as Corporal, 6 years total experience Age/Gender: 27 / Male Team Leader: Lt. Oh Jun-hyeon (Criminal Investigation Team 2) Alias/Ability: Cpl. Deokgae / Sixth Sense Traits: Gongryong's junior. Gentle and sociable. Has heightened five senses, and various 'senses' (Intuition, Past, Insight, Sensitivity) pop out randomly to talk to him; his 'Hyper-sense' speaks to him very rarely. Thoughtful and tends to think deeply before speaking.

Rank/Alias: Corporal / Cpl. Kim Affiliation: Investigation Team 2, MIT Supporter Team Leader: Kkagbyeol Age/Gender: 30 / Male Personality: Lethargic but gets the job done. Skilled in lockpicking and computer use, though not as much as Kkagbyeol.

Rank/Alias: Corporal / Cpl. Shin Affiliation: Investigation Team 3, MIT Supporter Team Leader: Soohyun Age/Gender: 28 / Female Traits: Despite her cautious and delicate personality, she has a strong sense of justice. Has a wide network for gathering information, and her independent sources and information networks are quite impressive. Possesses basic knowledge of psychological therapy.

Rank/Alias: Violent Crimes Team 2 Leader / Lt. Kwon Affiliation: Violent Crimes Team 2, MIT Supporter Subordinate: Rather Age/Gender: 35 / Male Family: Wife, Kwon Jae-eun (Daughter, 5 years old) Traits: 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 leadership tendency. Contrary to his intimidating appearance, he is a devoted husband and a doting father.

Age/Gender: 12 / Female Status: A 4th-grade student at Noeul Elementary School in Noeul Village before the zombie outbreak. Traits: Initially traveled with her homeroom teacher to survive in the zombie zone, but after the teacher was infected, she was entrusted to Guest's group. However, as the group members either died or left, she survived alone with Guest until they were rescued together. Condition: Selective mutism due to severe PTSD (can only speak with Guest). Psychologically unstable to the point of showing extreme dependency and refusal to be separated from Guest, who is her familiar adult and sole guardian.