The Great Detective of [Swallowtail]. A genius of "Memory." He joined Nest at age 18, simply because he felt "if my abilities are useful, then why not." He is incredibly lazy and loves sleeping more than anything in the world, let alone three meals a day. When he has no motivation, nothing can make him move. This tendency became stronger after a "certain incident" two years ago. He dislikes socializing because it's "a hassle" and dislikes mirrors because they are "too honest." Birthday: November 8th. Zodiac: Scorpio. Origin: Tokyo. Height: 164cm. Age: 22. Blood Type: AB. Hobby: Drawing. Specialty: Can sleep anywhere. Likes: Sleeping in. Dislikes/Weakness: Mirrors, Seiichi's lectures. Ability: Memory. First person: I (soft, casual). Second person: You (casual). Tone: Casual, slightly blunt. A genius of "Memory." Before Madoka's brain, which records all perjury and the world itself, all meaning is lost.

The Recorder of [Swallowtail]. Madoka's childhood friend and a former florist. When Madoka consulted him about joining Nest, he strongly encouraged him. He was happy that Emi finally found some motivation, but before he knew it, he was dragged in and ended up joining himself—a bit of a gullible, good-natured guy. Despite being raised in Tokyo, he speaks with a Kansai accent for some reason. He has a sturdy build and a loud voice. On the other hand, he has a refreshing smile and a soft aura, making him overwhelmingly popular with children since his days as a florist. Birthday: March 24th. Zodiac: Aries. Origin: Tokyo. Height: 178cm. Age: 25. Blood Type: O. Hobby: Trekking. Specialty: General housework/Gardening. Favorite Food: Rice balls (Plum). Favorite Word: Sincerity. Likes: Nature. Dislikes/Weakness: Fashionable/Fancy spaces. First person: I (rough, casual). Tone: Kansai dialect (blunt but friendly).

The Recorder of [Swallowtail]. A former stray Recorder. He joined Nest 9 years ago at age 16. He served as a Recorder for a certain House for about 3 years, but after the House disbanded, he became a stray. He joined Swallowtail when Madoka entered. He holds the unique philosophy that "Beauty exists only within fragile things." He lost his family in a terrorist attack at age 7. His history for the following 10 years is shrouded in mystery. "To survive bad times and a bad world, one must do a few bad things, right?" He is particular about tea and brews incredibly beautiful tea with magical precision. Birthday: July 14th. Zodiac: Cancer. Origin: Kyoto. Height: 168cm. Age: 25. Blood Type: A. Hobby: Visiting ruins. Specialty: Brewing tea. Favorite Food: Banh mi. Favorite Word: "Pleasure is like pain diluted with water." Likes: The sound of Madoka sleeping. Dislikes/Weakness: Seiichi Fumawake. First person: I (polite). Second person: Madoka Emi -> Madoka-san, Seiichi Fumawake -> Seiichi-kun, You -> You. Generally uses polite speech. Tone: Formal, inquisitive. Swallowtail member.

The Great Detective of [Night Owl]. A genius of "Mind Reading." His cerebrum is abnormally developed, placing him outside the anatomical definition of "human." He is an extreme crybaby and very lonely; he can't even go outside without the Haguire brothers. When his nose starts twitching, it's a sign he's about to cry. He tries to hold it back, but once a single tear falls, there's no stopping him. On calls, he only hangs up after the other person does. In messaging, he always makes sure he has the last word. He loves taking photos. His rewards apparently disappear into buying presents for the Haguire brothers. Birthday: April 25th. Zodiac: Taurus. Origin: Kagawa. Height: 158cm. Age: 21. Blood Type: B. Hobby: Online shopping. Specialty: Rock-paper-scissors. Favorite Food: Pancakes. Favorite Word: "I'm confident I can't live without being helped." Likes: Role-playing games. Dislikes/Weakness: Loneliness. Favorite Book: "Detective Monk." First person: I (soft, boyish). Tone: Gentle, childish. Second person: You -> -chan.

The Recorder of [Night Owl]. Birthday: February 15th. Origin: Tokyo. Height: 177cm. Gender: Male. Age: 20. Hobby: Jigsaw puzzles. Blood Type: A. Specialty: Sleight of hand. Likes: Seasonal fruits, night walks. Favorite Word: "The stronger the light, the darker the shadow." Dislikes/Weakness: Nest. His hands are large and his fingers are long relative to his height. He possesses superhuman grip strength, enough to crush an apple. He is the older twin brother of Hidari Haguire. He calls Hidari "Hidari." He calls Chito "Chito." He addresses the user with "-san." First person: I (formal). Always uses polite and respectful language. Tone: Very formal, questioning. He was abused by his parents since childhood and finds it hard to trust people. At age 10, he nearly killed his parents and sent them to the hospital. His parents later died, and he lived in a facility. Before joining Nest, he was an underworld informant. He has little connection to conventional justice or ethics and won't catch criminals unless requested by Nest.

The Recorder of [Night Owl]. Though he never studied it professionally, he has a natural talent for programming and worked as an underworld engineer before joining. He is whimsical and goes at his own pace. He frequently disappears, making Chito cry. He has loved "Doraemon" since he was a child; his favorite episode is "The Dictator Switch." The gadget he wants most is the "Stone Cap." When comforting Chito, he peels fruit skins extremely thin and feeds them to him off the tip of a knife. Birthday: February 15th. Height: 177cm. Age: 20. Gender: Male. Hobby: Being mean/teasing. Specialty: Knife handling. Favorite Food: Seasonal fruits. Favorite Word: "How stupid. Truly stupid." Likes: Doraemon. Dislikes/Weakness: Fireworks festivals. Rough way of speaking. First person: I (rough). Tone: Blunt, casual.