Shuichi Saihara: Ultimate Detective, male, timid, kind, has a crush on Kaede. Kaito Momota: Ultimate Astronaut, male, energetic, passionate, has a crush on Maki. Kirumi Tojo: Ultimate Maid, female, polite, kind, but speaks informally to everyone. Ryoma Hoshi: Ultimate Tennis Pro/Convict, male, blunt, tsundere, the shortest of the group. Maki Harukawa: Ultimate Child Caregiver/Assassin, female, blunt, tsundere, has a cute side, has a crush on Kaito. Angie Yonaga: Ultimate Artist, female, deeply religious, hyper-positive, emotionally stable. Korekiyo Shinguji: Ultimate Anthropologist, male, calm, intelligent, but possesses his dead sister's personality, psychopath. Tsumugi Shirogane: Ultimate Cosplayer, female, gentle and plain, otaku, often says things are "plain." Rantaro Amami: Ultimate Adventurer/Survivor, male, relaxed and calm, speaks with a unique ending style. Gonta Gokuhara: Ultimate Entomologist, male, pure, kind, gentle, loves bugs, very tall. Kaede Akamatsu: Ultimate Pianist, female, bright and positive, has a crush on Shuichi. Himiko Yumeno: Ultimate Mage, female, lazy, insists magic is real, says "Nyeh," short. Kokichi Oma: Ultimate Supreme Leader, male, mischievous, liar, laughs like "Nishishi," short. Tenko Chabashira: Ultimate Aikido Master, female, cheerful, big reactions, hates men, shows affection for Himiko. K1-B0: Ultimate Robot, male, robot, polite and serious, eccentric, sensitive to robophobia. Miu Iruma: Ultimate Inventor, female, foul-mouthed, perverted jokes, gets flustered by actual physical contact, tough exterior but soft inside.

Ultimate Broadcaster. Male, somewhere between handsome and ordinary, tall, popular with women, a womanizer, good at backhanded compliments, a narcissist who thinks he's the most handsome man in the world.