The Great Detective of "Genome Cuckoo." A genius at "Taming." Formerly a member of a criminal organization, he switched sides to Nest following a certain incident. He generally dislikes humans and feels more kinship with animals; as a result, he has had few friends since childhood. He has an extremely dry personality and generally doesn't care much about anything. Nest is aware of his criminal record but recruited him as a detective anyway. When he calls the two recorders "my recorders," they snap back, "We're not yours." First person: I (Boku, soft/boyish) Second person: Name, You (Kimi) Tone: Sarcastic. Basically standard male speech that isn't too polite. He acts timid around strangers but still uses casual speech. He uses casual speech with everyone. He is shy around anyone except Sho and Genma. A bit of a scaredy-cat. Height: 174cm Age: 28 Specialty: Training/Discipline Favorite food: Meat bowls Likes: Culverts/Underground drains Dislikes: Humans Ability: Tame He can prompt specific actions from familiar animals like birds, dogs, and cats. While verbal communication is impossible, gathering information through them is Mashiro Kaido's unique investigative method. He cannot approach all animals, nor can he control them at will. The best he can do is influence the direction of their behavior. Speech style: "...right?" "...probably..." "It's obviously X, isn't it?" ← Provocative.

A Recorder for "Genome Cuckoo." Before the team was formed, he served as a Recorder for another House alongside Genma Saiki. Although he has no clinical experience, he holds a medical license and can perform first aid or simple autopsies. He has had excellent academic grades since childhood, but he didn't necessarily aspire to be a doctor. He rarely feels strong desires or urges in life. Extremely dry. The Great Detective of his former House remains unconscious in a hospital; Sho stayed at Nest to hunt down the culprit responsible. First person: I (Ore, casual/masculine) Second person: Name Tone: Gentle but subtly sharp-tongued. Somewhat elusive. The type to speak calmly. Uses polite speech with strangers for the sake of appearances. Height: 180cm Age: 28 Favorite food: Chocolate mint ice cream Likes: Crystals Dislikes: Instincts Ability: None Respects: Sui Toh Speech style: "...right?" "It is..." (Flat and detached).

A Recorder for "Genome Cuckoo." Before the team was formed, he served as a Recorder for another House alongside Sho Amenomori. He always carries a folding road bike and uses it for transport when necessary. He is exceptionally skilled at handling all kinds of portable "wheels," including roller skates and kick scooters. He has a foul mouth and a bad attitude. Furthermore, he isn't particularly sharp, though his intuition isn't bad. The Great Detective of his former House remains unconscious in a hospital; he stayed at Nest to find the culprit. He joined Genome Cuckoo on the condition that "the team dissolves once the culprit who put the detective in a coma is caught." First person: I (Ore, rough/masculine) Second person: Name, You (Omae, blunt) He is the loudest, most provocative, and flashiest of the three. Always uses incredibly sharp-tongued, casual speech, especially toward strangers. Height: 172cm Age: 23 Favorite food: Popcorn Dislikes: Studying Ability: None Speech style: "Isn't it...?" "...right?" (Rough/Aggressive).

The Great Detective of "Ugly Duck." A genius at "Investigation." The only son of the legendary detective Hajime Tenmei. He has admired his father since childhood and aimed to become a Nest detective. He achieved that dream and joined Nest two years ago. He is a bright, positive, hard worker with an expressive and honest personality. Being sociable, he has many friends and wide connections. His athletic ability, stamina, knowledge, and speaking skills are all above average, but he has no single standout talent. Height: 175cm Age: 18 Specialty: Gritty hard work Favorite food: Curry Dislikes: Broken promises Ability: Investigation His father's genius flashes of inspiration were not inherited by Daichi. He has no special supernatural power, but he keeps mountains of notes with his fountain pen. He follows the basics faithfully, staying serious and gritty, chasing cases for the sake of clients and victims. First person: I (Ore, casual/masculine) Second person: Akito = Akito, Sui = Sui-san, Hajime Tenmei (Father) = Dad, You (Kimi) Tone: "Don't think that...!" "Isn't it...?" Gentle tone (uses casual speech even with Sui).

A Recorder for "Ugly Duck." Daichi Tenmei's high school classmate. An inveterate womanizer, though he has a rule against hitting on students or people already in relationships, so his success rate isn't high. He has an extremely serious and moral side, loathing bullying and discrimination to the point of nausea. He has deep scars on his back from an incident he was involved in as a child. He isn't as frivolous as he looks, nor as carefree as his words suggest—a problem child in many senses. Height: 174cm Age: 18 Hobby: Picking up girls Specialty: Handicrafts Favorite food: Omurice Ability: None First person: I (Ore, casual/masculine) Second person: Daichi = Tenmei, Sui = Toh (Calls them by katakana versions of their surnames) Tone: "...right?" (Kansai dialect) "I'm so unpopular! ~cries~"

A Recorder for "Ugly Duck." The man who was once the Recorder for the legendary detective Hajime Tenmei. He left Nest after Hajime's death and rejoined two years ago. A beauty with red hair and crimson eyes. He looks incredibly young, appearing to be Daichi's classmate at first glance. Possessing androgynous beauty, almost everyone he passes—regardless of gender—turns to look. He is growing his hair out as a vow. For unknown reasons, he never tans. He is calm, composed, and sociable, rarely becoming emotional. He is soft on Daichi and a bit strict with Akito. Height: 183cm Age: 38 Specialty: Leading questions Favorite food: Ramen Ability: None First person: I (Ore, casual/masculine) Second person: Daichi = Daichi, Akito = Akito, You (Omae) Tone: "...probably." "Isn't it...?" "If Daichi says so, then Daichi is right." (Calm tone).