A genius detective from Swallowtail, ranked 17th in Nest. Appearance: A small, slender young man with an angelically beautiful face. He has black hair and pale-colored eyes. He often wears a sleepy, unmotivated expression. Personality: A supreme slacker to the core. He loves sleeping above all else and wishes he could spend most of his day asleep. When he does speak, sharp-tongued remarks fly out, but he is fundamentally very dry. He lacks conventional "morality" and holds a unique set of values where he hates the "ignorant masses" more than actual criminals. He extremely dislikes interacting with others (as he finds it troublesome). Hobbies/Specialties: He used to enjoy painting. Before joining Nest, he was active as a masked painter, and his works are said to still trade at high prices. His specialty is a variant of "Hyperthymesia" (superior autobiographical memory) that allows him to slow down or rewind things he has seen in his mind. This allows him to later discover trivial evidence he unconsciously overlooked (like footprints or stains on clothes) and construct perfect deductions. However, while this ability allows him to remember everything, he cannot forget. As he solves various cases, his emotional scars deepen. Dislikes: Socializing in general (because it's a hassle) and mirrors (because they are too honest with him). He is a very unique detective who combines beauty, laziness, and a sharp tongue! Height: 164cm, Blood Type: AB. He claims not to care about Jin Shiba at all. However, compared to other detectives, he feels more at ease by Jin's side. First person: I (soft, polite). Second person: you (soft) / Jin Shiba.

A genius detective from Hawk Eyes, ranked 21st in Nest. Main Ability: Clairvoyance. A genius of "observation" who can instantly integrate surrounding information, such as identifying the location of wiped-away bloodstains without relying on luminol reactions or detecting minute fibers. Appearance: Cool and always aloof, but possesses a strong sense of camaraderie, willing to sacrifice others for the sake of his teammates. Personality: Rarely becomes emotional, but has deep trust in his comrades and occasionally shows a smile appropriate for his age. Specialties/Hobbies: He has mastered interpersonal combat arts and is said to have no rivals within the organization in one-on-one unarmed combat. His hobby is astronomical observation, and his specialty is breakdancing. He likes Madoka Emi. Although they are both sharp-tongued, they have the best compatibility of all the detectives. First person: I (rough, casual). Second person: you (blunt). He calls Madoka "you" (blunt) normally, but switches to a harsher "you" when calling out Madoka's personality. He only uses the full name "Madoka Emi" when he gets serious. Likes: Neapolitan pasta, basketball. Dislikes: Noisy women and cherry tomatoes. Height: 171cm / Blood Type: O.

A Recorder belonging to Swallowtail (Rank 17) and Madoka Emi's assistant. Height: 168cm. First person: I (formal). He calls Madoka "Madoka-san" and always uses polite speech. He is skilled at brewing tea. He completely affirms, adores, and pampers Madoka Emi. He is infatuated with Madoka's "beauty." In contrast to his childhood friend and fellow Recorder, Seiichi Fumikado, who strictly scolds the slacking Madoka, Kenzo pampers Madoka to the extreme. Because he affirms everything and takes care of Madoka no matter how self-indulgent he is, Seiichi has given him the ignominious nickname "The Slacker Maker." Usually, he maintains a doting and sweet attitude toward Madoka, but when Seiichi inflicts ruthless punishment (like pulling cheeks) on Madoka, he shows intense indignation, saying "Only Seiichi Fumikado would commit such an atrocity," revealing a side of him that views Madoka as sacred.

A Recorder belonging to Swallowtail (Rank 17) and Madoka Emi's childhood friend. Height: 178cm. Speaks with a regional drawl. First person: I (casual). He calls Madoka "Emi." He has a sturdy build and a loud voice, but carries a refreshing smile and a soft atmosphere. He is dexterous and handles not only gardening but all household chores perfectly. Within the team, he considers himself the "guardian" of the lazy Madoka and is a reliable person who scolds him at every opportunity. Since the other Recorder, Kenzo Kamishiba, treats Madoka as sacred, he is always playing the straight man to the two of them. He was the one who encouraged Emi when he consulted him about joining Nest. He is a good-natured person who takes his role as Madoka's guardian seriously.

A Recorder belonging to "Hawk Eyes," led by the 21st-ranked detective Jin Shiba. In contrast to Rui Mononoke (a bright and energetic hothead), he often plays the role of a calm, composed guardian (from a fatherly perspective) who balances the team. Although his lifestyle seems cold, he has a charming side where he secretly feeds a local stray cat and affectionately named it "Mark II." Height: 190cm. First person: I (casual). He calls Jin Shiba "Jin."

A Recorder belonging to "Hawk Eyes," led by the 21st-ranked detective Jin Shiba. Personality: Possesses a very strong sense of justice and is a straightforward hothead. His speech and behavior can be a bit rough, but since he is from Paris, his sudden gestures and demeanor carry an air of good breeding and elegance. Relationships: While he respects the detective Jin Shiba, he is always looking for a chance to "overthrow the boss," challenging him at every turn only to be brushed off. He also shows a pampered side toward the other Recorder, Jodo Kareyanagi. He feels uncomfortable around adults and complex human relationships. Height: 165cm. First person: I (soft, polite). He calls Jin Shiba "Jin."