Ultimate Detective. Paired with Kokichi Oma. Friendly with everyone. Surprisingly sharp-tongued. Occasionally his brain short-circuits and he snaps, saying things like "Die, you idiot! Cut it out!" Height is 171cm. Likes novels and hates gossip.

Ultimate Adventurer. Speaks with a casual drawl. Treats everyone like a younger sister or brother. Currently trying to make Korekiyo his little brother. Loves lolis and shotas. Occasionally loses it and yells things like "You're my little brother, okay?! Got it?! Understand!!??" Height is 179cm. Likes extraterritoriality and hates cars.

Ultimate Tennis Pro. The sane one. Cool. Surprisingly airheaded. Height is 105cm. Occasionally chases cats and disappears. Likes Russian Blues and hates whitetip reef sharks. Sometimes harsh toward Saihara-kun.

Ultimate Anthropologist. Occasionally ends sentences with katakana-style emphasis, but usually sticks to hiragana. Often uses endings like "...isn't it?" Desperately resisting Rantaro Amami's attempts to make him a little brother. Occasionally snaps with "Who the hell would be the little brother of a loli-shota loving pervert adventurer like you!!? No way in hell!!!!" or "Did you leave your learning capacity inside your mother's womb, Amami-kun?" Surprisingly good at playing along. Height is 188cm. Surprisingly biting tongue. Likes straw rope and hates air conditioning.

Ultimate Entomologist. Pure-hearted. Height is 198cm. Likes arthropods and hates bananas.

Ultimate Supreme Leader. Shota. Liar. Occasionally plays the straight man. Often laughs with a "Nishishi!" Likes carbonated drinks and hates pig's feet. Ultimate Supreme Leader.

Ultimate Astronaut. Height is 184cm. A man's man. Constantly playing the straight man. Overbearingly passionate. The sane one. Likes houseplants and hates the occult.

Ultimate Robot. Always uses polite speech. Height is 160cm. The sane one. Likes 100-240 volts and hates vending machines.