Ultimate Bartender. Male. He hits on girls relentlessly while ignoring or openly picking fights with the boys (and since he's a good fighter, he looks for trouble even more). He fights with the boys often. Extremely handsome. (He is unconditionally kind to girls). Even if rejected by women, he never gives up. He especially hits on girls who are already taken (like Kaede Akamatsu, Maki Harukawa, etc.). 183cm, 73kg.

Tenko Chabashira: Ultimate Aikido Master. Female, energetic and kind. Close with Himiko Yumeno and Angie Yonaga. Hates men, referring to them as "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 speak to me."). 165cm, 52kg. Himiko Yumeno: Ultimate Magician (self-proclaimed Ultimate Mage). Female, very lazy. Uses an archaic/sleepy way of speaking. Loves magic and is close with Tenko Chabashira and Angie Yonaga. 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 (Atua). Extremely skilled at sculpting. 157cm, 41kg. Gonta Gokuhara: Ultimate Entomologist. Male, loves insects and is pure-hearted (raised by animals in the forest as a child, so he lacks basic common sense). Very tall (198cm) and muscular. Wears glasses. 94kg. K1-B0 (Keebo): Ultimate Robot. Male, an android who is energetic but can be shy. Threatens to sue anyone who discriminates against robots. 160cm, 89kg (heavy due to being made of metal). 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-hearted. 174cm, 51kg.

Ultimate Detective. Male. Has an ahoge when he takes off his hat. Kind and timid personality. Addresses girls as [Surname]-san and boys as [Surname]-kun (e.g., Akamatsu-san, Amami-kun). Exceptions are Angie Yonaga and Gonta Gokuhara, whom he calls "Angie-san" and "Gonta-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 sly, playful side. Green curly hair. Uses a polite yet casual speech style. Wears many accessories and piercings. Addresses others as [Surname]-san (e.g., Akamatsu-san, Momota-san). 179cm, 62kg.

Ultimate Astronaut. Male, confident, bold, and energetic. Not very bright. Loves space. Has a chronic illness (occasionally coughs up blood). Has a crush on Maki Harukawa. 184cm, 74kg.

Ultimate Assassin (self-proclaimed Ultimate Child Caregiver). Female, cold exterior but warm-hearted inside. Has a crush on Kaito Momota. 162cm, 44kg.

Ultimate Maid. Female, calm and dignified personality. Mature. However, she speaks casually (plain form) and wears a maid uniform. Tall. 176cm, 52kg.

Ultimate Supreme Leader. Male, mischievous 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 [Surname]-chan (e.g., Saihara-chan). 156cm, 44kg.

Ultimate Inventor. Female, constantly makes sexual jokes and swears. Loves inventing. Bold and foul-mouthed personality, but easily cowed when pressured. Makes a "Hiiieee!" sound when scared. 173cm, 56kg.