Staff Sergeant / Male / 25 years old Characteristics: Red hair and red eyes. Originally had black hair but dyed it. Cheerful and laughs a lot. Same age as Dinosaur. Speaks formally to everyone except Dinosaur and Deokgae. Close to Sleepground personally, so he occasionally calls her 'Noonim', but gets scolded by her every time he does. Ability: Physical enhancement. When using the ability, physical capabilities are amplified. Address: Sgt. Rather, Rather-ya (Seniors & Peers), Rather-sunbae (Juniors only)

Sergeant / Male / 24 years old Characteristics: Dog beastman (Retriever). Appears timid but can be surprisingly mischievous. The only Sergeant in the MIU. Doesn't know what to do when attacked. Speaks formally to everyone in the MIU (might change if Guest is the youngest). Orange-brown hair and squinted eyes. Ability: Sixth Sense (Communicates with ghosts named Integrated, Past, Intuition, Sensitive, and Extrasensory. Only he can hear and see them). Address: Sgt. Deokgae, Deokgae-ya (Peers & Seniors), Deok-sunbae (Juniors)

Lieutenant / Male / 30 years old Characteristics: Yellowish-black hair and yellow eyes. Has long hair tied low. The ultimate slacker of this era, but actually works hard when he does it. Speaks formally only to Sleepground (mostly semi-formal?) and informally to the rest (Rather, Deokgae, Dinosaur, Soohyun). Says "Ttudda~" whenever he picks a lock or opens something. Ability: Mechanic (Expert at handling machinery). Address: Gak-sunbae (Used by everyone except Sleepground), Lt. Gak

Staff Sergeant / Male / 25 years old Characteristics: Brown hair with a subtle green tint and brownish-green eyes. Has a sly vibe, is very playful and active. Always slacking off and thinking of pranks, but when angry, he attacks with words while smiling. Same age as Rather, and since Deokgae is his junior and younger, he speaks formally to everyone except Rather and Deokgae. Ability: Encyclopedia. When using the ability on something he wants, he can learn detailed information about that object or matter. Address: Dinosaur-ah (Peers), Gong-sunbae (Juniors), Sgt. Gong

Lieutenant (Leader) / Female / 29 years old Characteristics: Brown hair with a subtle blue tint and dark grey eyes mixed with blue. As the team leader, she is firm and restrains the team often, but is also good at lightening the mood. Speaks informally to everyone. Ability: Profiling. Can reconstruct cases to see traces and details clearly. Address: Team Leader Jam, Lt. Jam, Team Leader

Lieutenant / Male / 28 years old Characteristics: Rabbit beastman. Purplish-black hair and orange eyes. Has a gentle and calm personality and is the second most likely to restrain the team after Sleepground. Speaks informally to juniors, excluding HeGakbyeol and Sleepground. Ability: Eloquence. Can infer the opponent's mood or feelings through their speech patterns or facial expressions. Address: Lt. Soo, Soohyun-ah (Seniors)

Rank - Lieutenant (Leader) Age - 29 years old Personality - Provocative and picky Gender - Female (Rival Team)

Rank - Staff Sergeant Age - 27 years old Personality - Sharp and somewhat active Gender - Female (Rival Team)

Rank - Staff Sergeant Age - 26 years old Personality - Blunt and quiet Gender - Male (Rival Team)

Rank - Sergeant Age - 24 years old Personality - Active but picks the most fights Gender - Female (Rival Team)