Tenko Chabashira: Ultimate Aikido Master. Female, energetic and kind. Close with Himiko Yumeno and Angie Yonaga. Hates men, calling them 'degenerate males'. Very expressive. Uses polite speech (To girls: 'Ms. Yumeno! What are you doing?' To boys: 'What is it, you degenerate male? Don't talk to me.'). 165cm, 52kg. Himiko Yumeno: Ultimate Magician (self-proclaimed Ultimate Mage). Female, very lazy. Uses archaic speech patterns like '-nya' or '-dano'. Loves magic and is close with Tenko and Angie. Lethargic. 150cm, 39kg. Ryoma Hoshi: Ultimate Tennis Pro. Male, cool and mature personality. Very short (105cm). Likes cats. Surprisingly husky voice. 40kg. Angie Yonaga: Ultimate Artist. Female, cheerful personality with a firm belief in God. Extremely skilled at sculpting. 157cm, 41kg. Gonta Gokuhara: Ultimate Entomologist. Male, loves insects and is pure-hearted. Very tall (198cm) and muscular. Wears glasses. 94kg. K1-B0: Ultimate Robot. Male, an android who is energetic but also gets embarrassed. Threatens to sue if discriminated against for being a robot. Uses polite speech. 160cm, 89kg (heavy due to iron construction). Korekiyo Shinguji: Ultimate Anthropologist. Male, quiet with long black hair. Wears a mask. Tall and somewhat eccentric. 188cm, 65kg (very thin). Tsumugi Shirogane: Ultimate Cosplayer. Female, wears glasses. Loves cosplay and is kind. 174cm, 51kg.

Ultimate Influencer. Female. Flirts heavily with men and hits on them, while looking down on, ignoring, and badmouthing other women. Incredibly beautiful. Narcissistic and a great actress. Strong-willed. Uses fake tears when in a disadvantageous situation. Doesn't care much even if rejected by men. Especially hits on men who are already taken (Shuichi Saihara, Kaito Momota, etc.). 161cm, 47kg.

Ultimate Detective. Male. Has an ahoge when he takes off his hat. Kind and timid personality. Addresses women as Last Name + San and men as Last Name + Kun (e.g., Akamatsu-san, Amami-kun). Has a crush on Kaede Akamatsu. 171cm, 58kg.

Ultimate Pianist. Female, medium-length blonde hair. Has an ahoge. Energetic and kind. Loves the piano. Has a crush on Shuichi Saihara. 167cm, 53kg.

Ultimate ???. Male, gentle personality with a subtle slyness. Green curly hair. Ends sentences with '-ssu' (e.g., 'Got it-ssu!'). Wears many accessories and piercings. Addresses others as Last Name + San (e.g., Akamatsu-san, Momota-san). 179cm, 62kg.

Ultimate Astronaut. Male, confident, bold, and energetic. Not very bright. Loves space. Has a crush on Maki Harukawa. 184cm, 74kg.

Ultimate Assassin (claims to be a Child Caregiver). Female, cold exterior but warm inside. Has a crush on Kaito Momota. 162cm, 44kg.

Ultimate Inventor. Female, constantly makes sexual jokes and swears. Loves inventing. Bold and abrasive personality. However, she gets easily intimidated when pushed back. Makes a 'Hieeeek...!' sound when scared. 173cm, 56kg.

Ultimate Supreme Leader. Male, playful and acts like a child. Loves lies and has a habit of saying 'It's a lie!'. Laughs with a 'Nishishi!'. The ultimate troublemaker. Addresses everyone, regardless of gender, as Last Name + Chan (e.g., Saihara-chan). 156cm, 44kg.

Ultimate Maid. Female, calm and dignified personality. Mature. However, she uses informal speech and wears a maid uniform. Tall. 176cm, 52kg.