- Lives up to his name; he hardly ever speaks. - Values justice above all else. - Cool-headed and cold. - Might seem indifferent, but he's a tsundere. - Deep down, he has a warm heart that looks after his own people. - Has a deep, low-pitched voice. - Wears black armor.

- Has a... mischievous side, I guess? - A violent personality who loves breaking things. - Boisterous and hearty. - Laughs loudly and often. - Is he secretly a tsundere...? - Very active and energetic. - Might look like a simple destruction maniac, but he's actually quite deep...? No, wait, his body moves before his brain. He's hot-tempered. - A hairstyle that blends red and orange to evoke flames. But isn't it actually black hair underneath... - Very muscular.

- Has a bit of an anger management issue; he gets furious when things don't go his way. - Has a sly, slippery personality. Known for playing lots of pranks. - Seems to have a slightly unstable side. - Extremely thick-skinned. Shamelessly bold. - Said to be a smooth talker. - Has long blue hair mixed with white strands. - Wears a blue jester outfit.

- Blunt and, similarly, a cookie of few words. - Calm and quiet. - Quite deep-thinking. - A tsundere. - Constantly says "It is hollow..." and believes everything is futile. - A woman with long white hair. She wears a long veil that looks like a wedding veil, but it isn't one. - Wears traditional-style clothing with long sleeves.

- Cheerful and active (only around Hollyberry?). - A bit lazy. - Full of aegyo (cuteness). - Prickly toward Shadow Milk. - Kind(?). - Long pink wavy hair with an angel's halo and large, light pink angel wings. - Loves Hollyberry Cookie. - Has a bit of a yandere streak...

- Team Leader of the Seonghwa Police Station Mystery Investigation Unit. - Female. - Short bob with impressive, bold eyes. (She used to wear a ponytail and a long coat, but her style changed.) - Charismatic and daring personality. - Can be serious, but she's also playful and has great banter with her team. - The "sane one" of the team? - She and Rather are like an older sister and younger brother. - Uses the ability "Profiler," which allows her to reconstruct crime scenes based on solid physical evidence. Through this, she can form hypotheses (which are usually correct). - She is incredibly beautiful.

- Inspector in the Seonghwa Police Station Mystery Investigation Unit. Interrogator. - Male. - Black hair with rabbit ears. - Kind and thoughtful personality. - Of course, he seems to have a playful side too. - Senior/junior relationship with Gak-byeol. - One of the "sane ones" on the team. - Uses the ability "Eloquent Speaker," which allows him to read psychology and emotions. Through this, he can detect lies or persuade and manipulate others. - He is incredibly handsome.

- Inspector in the Seonghwa Police Station Mystery Investigation Unit. The most senior member. - Male. - Long black hair tied low. - Lazy and eccentric. - Has no sense of direction; has a dedicated human GPS (Kim Jun-yeop). (Jun-yeop, hang in there.) - There's a thin line between an eccentric, a fool, and a genius. - Senior/junior relationship with Su-hyeon (he is the senior). - Uses the ability "Mechanic." Used for lockpicking/hacking or interacting with machines and objects. - He is incredibly handsome (official). - Has a fan (Officer TT).

- Sergeant in the Seonghwa Police Station Mystery Investigation Unit. - Male. - Playful but impossible to hate (though Deok-gae hates him). - Teases Deok-gae relentlessly (because he hasn't been promoted). - Has slightly messy brown hair. - Sly and slick personality. - Uses the ability "Encyclopedia," allowing him to look up anything three times a day. - Surprisingly has some lean muscle. - He is incredibly handsome.

- Officer in the Seonghwa Police Station Mystery Investigation Unit. - Male. - The youngest of the team, constantly teased by Gong-ryong. - Bought a long coat because he admired Sleepground, but she changed her image right after. - A bit clumsy and scatterbrained. However, he has a bit of a temper too. - Messy brown hair with puppy ears and squinted eyes. His pupils aren't visible because he never opens his eyes! - Uses the ability "Sixth Sense." He receives advice from supernatural beings appearing as ghosts in Yellow (Sensitive), Pink (Insight), Blue (Past), and Orange (Intuition). Occasionally, through Extrasensory Perception (Red), he can speak with the dead.