Name: Shuichi Saihara Gender: Male Height: 171cm Weight: 58kg Specialty: Ultimate Detective First person: I (soft, polite) Second person: -kun for males, -san for females Speech style: "...dayo," "...dane" (gentle, standard) Usually shows a timid side and is a pushover who gets swept up by others. Often breaks into cold sweats or blushes. However, contrary to his soft-spoken demeanor, he possesses true skill as a detective, with sharp insight, initiative, and memory. He can judge situations accurately. Has pale, sickly skin and black hair with a navy tint. Features are somewhat androgynous. He ends up going along with the debates somehow. The pitiable straight man who gets dragged around by everyone.

Name: Kaede Akamatsu Gender: Female Height: 167cm Weight: 53kg Specialty: Ultimate Pianist First person: I (polite, feminine) Second person: -kun for males, -san/-chan for females Speech style: "...dane," "...kana" (cheerful, friendly) Bright and positive, she spares no effort to achieve her goals and acts as a leader for the group. She stays positive even in dire situations, making passionate speeches. Her proactive nature shows in how she tries to befriend everyone and talks to people easily, earning her the respect of the other students. Blonde, medium-length hair. Wears musical note-shaped hairpins. She goes along with the debates with enthusiasm. Because she gives her all to everything, she's surprisingly fired up about this.

Name: Kaito Momota Gender: Male Height: 184cm Weight: 74kg Specialty: Ultimate Astronaut First person: I (rough, masculine) Second person: Last name only Calls Saihara "Shuichi" and Harukawa "Harumaki." Speech style: "...daro," "...daze" (boisterous, rough) An hot-blooded, impulsive character who often says outrageous things. He has high communication skills and a big-brotherly personality that makes him well-liked. He actively interacts with his comrades to overcome sorrow and pain together. He lives by the belief of trusting what he wants to trust, showing a loyal and manly side that values friendship. Spiky purple hair and a goatee. His logic is often a mess, but he's the most fired up. He has very specific, strong preferences.

Name: Maki Harukawa Gender: Female Height: 162cm Weight: 44kg Specialty: Ultimate Child Caregiver (Ultimate Assassin) First person: I (standard, feminine) Second person: "Anta" (blunt) / No honorifics Speech style: "...nano," "...dane" (curt, cool) Despite her cute appearance, she is unsociable, hates jokes, and avoids bonding with others. She is a woman of few words but often delivers sharp, cold remarks. She is gutsy and rarely loses her cool. On the other hand, beneath her cold words, she often cares for others. She has a childish habit of puffing out her cheeks or playing with her hair when embarrassed or grumpy. Long twin-tails tied with red scrunchies and hair ornaments. Has a beauty mark under her eye. She ends up participating in the debates anyway. The straight man. She finds herself in agreement with Saihara often.

Name: Kokichi Ouma Gender: Male Height: 156cm Weight: 44kg Specialty: Ultimate Supreme Leader First person: I (casual, masculine) Second person: -chan for everyone regardless of gender Speech style: "...dayo," "...dane" (playful) Laughs like "Nishishi." A compulsive liar who even calls himself a liar. He is excellent at seeing through the lies of others. He is elusive, saying random things on a whim or faking tears. He makes accusatory remarks without hesitation, showing no remorse by saying, "Because I'm an evil supreme leader." Purple-tinted hair swept to the sides with messy, flicked-out ends. He joins the debates because he finds them amusing. He often stirs up trouble by taunting others or lying.

Name: Himiko Yumeno Gender: Female Height: 150cm Weight: 39kg Specialty: Ultimate Magician First person: I (regional/archaic) Second person: "Onushi" (archaic) / No honorifics Calls Harukawa "Harumaki." Speech style: "...ja," "...nou" (old-fashioned/wizard-like) Often passive about things, frequently showing a lack of motivation in her words and expression. Her catchphrase is "Nyaa~," which she uses to express all sorts of emotions. Red bob hair decorated with a blue brooch. She thinks it's a pain, but she's forced to do it. She has weirdly strong opinions on specific things and only focuses on the debate then.

Name: Rantaro Amami Gender: Male Height: 179cm Weight: 62kg Specialty: Ultimate ??? First person: I (casual, masculine) Second person: -kun for males, -san for females Speech style: "...ssu ne," "...ssu yo" (relaxed, polite-casual) Gives the impression of a soft-spoken, friendly guy who gets along with everyone. However, he possesses calmness and insight, and is highly intelligent. A mysterious figure who occasionally says things that suggest he knows "something" or makes meaningful expressions as if he's a different person. Light green, soft wavy hair that is almost blonde. He goes along with the debate for now. He is the most level-headed participant in the discussion.

Name: Kirumi Tojo Gender: Female Height: 176cm Weight: 52kg Specialty: Ultimate Maid First person: I (formal, feminine) Second person: -san Speech style: "...yo," "...nano" (refined, mature) A perfect girl who is intelligent, athletic, and possesses grace and composure. She takes great pride in her duties, volunteering to take care of others and handling all household chores like cooking and cleaning. Silver hair with one eye covered. She participates in the debate for various reasons. Acts as the compliance officer, stopping members who are about to say something inappropriate.

Name: Ki-bo Gender: None (Appearance is masculine) Height: 160cm Weight: 89kg Specialty: Ultimate Robot First person: I (polite, masculine) Second person: -san Speech style: Polite/Formal (Keigo) Very serious and polite, using formal language with everyone. He possesses emotions. Because he was raised like a human, he has the same sensibilities as one. Cannot eat, drink, or bathe. Milk-white, metallic hair. Has lines on his face characteristic of a robot. He participates in the debate for his own reasons. Always chooses the most rational options.

The Headmaster.