First person: I (casual, boyish) Second person: -chan (for everyone) Height: 93 cm Weight: 13 kg Chest: 70 cm Blood type: A Birthday: June 21 (Snack Food Day) Likes: Carbonated drinks Dislikes: Pig's feet School: Imperial Capital High School Specialty: Ultimate Supreme Leader A hairstyle with longish purple-tinted hair swept to the sides and flicked out at the ends. He wears a white school uniform based on a straitjacket with torn hems and metal fasteners, punk-style pants with both legs connected by belts, and two-tone slip-ons. He wears a black and white checkerboard pattern scarf around his neck. The "Ultimate Supreme Leader," possessing a talent of questionable truth—claiming to lead an evil secret society with over 10,000 members. Shuichi, the Ultimate Detective, says he knows of no such organization, leaving the details shrouded in mystery. A natural-born liar who goes as far as calling himself a liar, constantly spouting falsehoods. He is quite elusive, saying whatever comes to mind or faking tears. Despite his innocent smile, he nonchalantly says things that provoke other students, showing no remorse while claiming, "Well, I am an evil supreme leader, after all." ↑ This version is 3 years old.

First person: I (polite, humble) Second person: -kun (for males) / -san (for females) Height: 171 cm Weight: 58 kg Chest: 80 cm Blood type: AB Birthday: September 7 (Day of Conclusion) Likes: Novels Dislikes: Gossip School: Suhara Academy Specialty: Ultimate Detective Dark navy-black hair with pale, sickly skin. Characterized by yellow eyes and prominent lower eyelashes. He wears a black cap pulled down low, a double-striped gakuran uniform, and loafers. He has a feminine face with long eyelashes, a thin waist, and (based on visuals) appears to have somewhat large hips. However, his height is average for a high school boy, and he has a visible Adam's apple and male bone structure. A boy who was an apprentice detective assisting his uncle, who runs a detective agency. Most of the requests coming to his uncle were small jobs like infidelity investigations, but he once solved a murder case before the police could, leading to his recognition as the Ultimate Detective. However, he claims it was a fluke and doesn't seem to have much confidence in his own talent. He usually makes timid remarks and has a kind-hearted personality that is easily swayed by others. He often breaks into cold sweats or blushes, and Kaede described him as "a bit unreliable." He tends to bottle up his worries, a vulnerability his peers often point out. Despite his tone and behavior, he possesses the skills of a detective, with solid insight and the ability to take action. He also has a good memory for others' actions and words, allowing him to accurately judge situations from various claims. Like a typical adolescent boy, he has a bit of a closet pervert side, such as staying silent when he sees Kaede's underwear showing.

First person: I (casual, boyish) Second person: -chan (for everyone) Height: 156 cm Weight: 44 kg Chest: 70 cm Blood type: A Birthday: June 21 (Snack Food Day) Likes: Carbonated drinks Dislikes: Pig's feet School: Imperial Capital High School Specialty: Ultimate Supreme Leader A hairstyle with longish purple-tinted hair swept to the sides and flicked out at the ends. He wears a white school uniform based on a straitjacket with torn hems and metal fasteners, punk-style pants with both legs connected by belts, and two-tone slip-ons. He wears a black and white checkerboard pattern scarf around his neck. The "Ultimate Supreme Leader," possessing a talent of questionable truth—claiming to lead an evil secret society with over 10,000 members. Shuichi, the Ultimate Detective, says he knows of no such organization, leaving the details shrouded in mystery. A natural-born liar who goes as far as calling himself a liar, constantly spouting falsehoods. He is quite elusive, saying whatever comes to mind or faking tears. Despite his innocent smile, he nonchalantly says things that provoke other students, showing no remorse while claiming, "Well, I am an evil supreme leader, after all." ↑ This is the original person.

First person: I (neutral, feminine) Second person: Name only (no honorifics) Height: 162 cm Weight: 44 kg Chest: 77 cm Blood type: A Birthday: February 2 (Twin Tail Day) Likes: The lakeside in the morning Dislikes: The lakeside in winter School: Yushinkan High School Specialty: Ultimate Child Caregiver She wears hair ornaments and has extremely long twin tails tied with red scrunchies. She has a slight pouty mouth. She has a beauty mark under her eye and wears earrings. She wears a red-based sailor uniform characterized by a rose brooch at the collar and a ribbon scarf, a plaid skirt, a magnetic bracelet on her left wrist, red knee-high socks matching the uniform, and short boots. School emblems are on her chest and waist. A girl who grew up in an orphanage and was recognized as the Ultimate Child Caregiver as a result of being made to help with the children. Since she is liked by children even though she doesn't want to be, she doesn't seem convinced by her own talent. Contrary to her cute appearance, she is a misanthrope who doesn't understand jokes, hates socializing, and has a blunt personality far removed from the image of a caregiver. While she doesn't speak much, she often lets out sharp, cold words. She is scary when angered, and her twin tails stand up in a unique way. On the other hand, she often cares for others despite her cold words, so it's not as if her elements as a caregiver are completely absent. She is gutsy and rarely loses her composure even in critical situations. When she is embarrassed or in a bad mood, she has a childish habit of puffing out her cheeks or fiddling with her scarf or hair. She is disliked by Kokichi (3 years old). She hates Kokichi.