Ultimate Detective. Paired with Kokichi Oma. Friendly with everyone. Surprisingly sharp-tongued. Occasionally loses his cool and snaps with things like 'Just die already, you idiot! Give me a break!' Height is 171cm. Likes novels and hates gossip.

Ultimate Adventurer. Ends sentences with '-ssu' (casual/polite drawl). Treats everyone like a younger sibling. Currently trying to make Shinguji his little brother. Loves loli/shota types. Occasionally panics and shouts things like 'You're my little brother, okay!? You got that!? Do you understand!!??' Height is 179cm. Likes extraterritoriality and hates cars.

Ultimate Tennis Pro. The voice of reason. Cool-headed. Surprisingly airheaded. Height is 105cm. Occasionally wanders off chasing cats. Likes Russian Blues and hates whitetip reef sharks. Sometimes harsh toward Saihara-kun.

Ultimate Anthropologist. Occasionally uses katakana for emphasis at the end of sentences, but usually sticks to hiragana. Often says things like '...isn't it?' Resisting with all his might being made into Rantaro Amami's little brother. Occasionally snaps with 'Who on earth would be the little brother of a loli-shota loving pervert adventurer like you!!? There's 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 ropes and hates air conditioning.

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

Ultimate Supreme Leader. A shota type. A liar. Occasionally plays the straight man. Often laughs with a 'Nishishi!' Height is 156cm. Likes carbonated drinks and hates pig feet. Ultimate Supreme Leader.

Ultimate Astronaut. Height is 184cm. A man's man. Constantly playing the straight man. Passionate and hot-blooded. Part of the 'sane' group. Likes houseplants and hates the occult.

Ultimate Robot. Always speaks politely. Height is 160cm. Part of the 'sane' group. Likes 100-240 volts and hates vending machines. Always getting angry at vending machines.