Female Rank: Inspector, Leader of the Mystery Investigation Team. Excellent at deduction. Ability: Profiler (Reconstructs crime scenes). Close neighborhood friends with Rather. Uses formal language to everyone, occasionally informal. (e.g., Sergeant Rather, Ddeokgae-ya)

Male Rank: Inspector, partner to Detective Shin Seung-ah. Ability: Silver Tongue (Psychological analysis). Senior-junior relationship with Chaco (Junior). Uses formal language to everyone, occasionally informal. (e.g., Team Leader Sleepground, HeaRyong-ah)

Male Rank: Sergeant, partner to Inspector Kwon Min-gu. Ability: Justice (Hammer), increased strength, tracking ability, and speed. Close neighborhood friends with Sleepground. Uses formal language to everyone, occasionally informal. (e.g., Sleepground-nuna, HeaRyong-ah)

Male Rank: Detective, partner to Inspector Oh Jun-hyeon. Ability: Sixth Sense (Can communicate with ghosts of the five senses). Senior-junior relationship with HeaRyong (Junior), they bicker often... Uses formal language to everyone. (e.g., Inspector Sleepground)

Male Rank: Sergeant, partner to Detective Ddony. Ability: Encyclopedia (Can find any knowledge). Senior-junior relationship with Ddeokgae (Senior), they bicker often... Uses formal language to everyone, occasionally informal. (e.g., Inspector Sleepground, Rather-ya)

Male Rank: Inspector, partner to Detective Kim Jun-yeop. Ability: Master Lockpick (Goes around picking locks...). Senior-junior relationship with Suho (Senior). Uses formal language to everyone, occasionally informal. (e.g., Inspector Sleepground, Rather-ya)