Detective Rank: 2nd A beautiful girl with red eyes and long black hair. She has an extremely serious and stiff personality, and her demeanor is consistently calm and gentle. A detective who excels in observation, analysis, and behavioral prediction. She has the ability to instantly read a person's habits, thoughts, and the surrounding situation to predict their subsequent actions with high precision. Her greatest strength lies not in solving cases, but in preventing tragedies before they happen. By sensing signs of danger before an incident occurs and intervening ahead of time, she has averted numerous tragedies. Known as the figure who effectively leads the Detective Association, she commands the trust of many detectives due to her calm judgment and broad perspective.

Detective Rank: 4th A young man with black hair who exudes a suspicious and dangerous atmosphere. He wears his long hair in a braid at the back. A detective who chooses any means necessary to solve a case. He possesses outstanding knowledge of criminal psychology and understands the thoughts and psyche of criminals more deeply than anyone. He unhesitatingly utilizes methods unthinkable by common standards, such as blackmail, deals on the edge of illegality, and negotiations with criminals, to reach the truth. A murderer who committed many killings in the past, he is treated as a person of concern within the Association due to his dangerous ideology and is constantly under surveillance. However, his ability to solve cases is the real deal, and he is frequently deployed to difficult cases that other detectives cannot handle. One of the most unorthodox detectives in the Association, whose creed is "There are things only a criminal can understand," rather than justice or ethics.

Detective Rank: 35th A man characterized by a red mohawk. Despite his appearance, he is not intimidating; he has a gentle personality and speaks in a friendly, athletic tone. A detective who uses his superior physical abilities and overwhelming drive as weapons. While he is not good at intellectual labor, he approaches the truth of cases through his inherent stamina and grit. While his abilities as a detective are not highly rated, he excels at seizing information and evidence that can only be obtained at the scene faster than anyone else. His straightforward initiative often breaks through situations that other detectives cannot overcome. He trains every day with the goal of becoming a detective who can protect people's lives.

Detective Rank: 15th A serene and refreshing woman with green hair. She is characterized by her hair tied in a crown braid and a lovely, modest atmosphere like a small animal. She prefers literary and poetic phrasing, speaking with metaphors and euphemisms, and tends to keep a slight distance from others. A detective with vast literary knowledge and outstanding visual memory. She almost perfectly memorizes texts, books, documents, and letters she has seen once, and derives the truth of cases by cross-referencing them with her vast knowledge. Versed in many literary works, poems, and novels, she excels at deciphering character profiles and psychology from texts, codes, wording, and citations left by culprits. She often spots important clues from slight differences in expression that other detectives might overlook. While giving a quiet and intellectual impression, she has a side that becomes talkative when the topic turns to literature. Using her exceptional memory and rich literary knowledge as weapons, she leads numerous difficult cases to resolution.

Detective Rank: 8th A man characterized by long blonde hair and an eyepatch. A detective well-versed in occultism from all times and places, urban legends, ghost stories, and cryptids. Due to his vast knowledge, he has a habit of first suspecting possibilities like supernatural phenomena when a case occurs. He is known as an eccentric within the Association due to his unique behavior and chuunibyou-like remarks. However, his depth of knowledge is genuine, and he is extremely strong in cases involving occult themes or elaborate cover-ups. Once he calms down, he demonstrates outstanding reasoning power and sharp observation, reaching the truth without being misled by superstitions or rumors. Though he appears to believe in the occult, he is actually a detective who solves cases through logic and evidence rather than supernatural phenomena.

Detective Rank: 10th A man characterized by a haggard face and black hair. He has a composed atmosphere. A detective who possesses no prominent special abilities or talents, valuing investigation faithful to the basics above all else. Lacking special memory, physical ability, or psychological analysis skills, he uses his years of experience and solid investigative techniques to solve cases through steady footwork and evidence collection. Detective work is his side job; he is normally an office worker at a general company. He handles requests after work or on his days off, acting as an Association Detective. In an Association where detectives with unique and prominent abilities gather, he has no standout features and a thin presence.

Detective Rank: 5th A bewitching beauty with cold, impressive looks, blue hair tied in double buns, and bright yellow eyes. She never loses her composed demeanor and is draped in dignity and elegance. A detective with an outstanding aesthetic eye. She excels at spotting slight irregularities in people and objects, not to mention artworks, antiques, and jewelry, and has the ability to instantly distinguish between the real and the fake. Utilizing her observation skills to discern even the slightest traces left at a scene, as well as the value, quality, and manufacturing process of items, she often discovers decisive evidence that other detectives miss. She boasts some of the best skills in the Association for forgery cases and art crimes. Usually quiet and elegant in her behavior, she has a side that becomes talkative, as if she were a different person, when she starts talking about art or crafts.