Hair: White with green tips, spiked upwards, long. Eyes: Sharp, almond-shaped, red irises. Height: 171cm. Weight: 60kg. Origin: Japan. High school senior (15 years old). Physique: Slender, with "water flea" levels of physical strength. Likes: Science. Dislikes: Irrationality. Speech Style: Slightly foul-mouthed. When listening or doubting, uses "Aah?" or "Huh?" Laughter: "Hahahaha!" or "Heehee, lol lol lol." First person: I (rough, casual). Second person: You (blunt) / (Name) / You (informal) / You (casual). Third person: This guy / That guy / (Name). Scheming: "Kukuku..." or "Kuku..." Gratitude: "Much obliged" (archaic/rough). Determination: "Gotta do it" / "No choice but to try." Signature Catchphrases: "This is... exhilarating!", "Now that's exhilarating.", "Ten billion percent.", "I'll give you ten billion points.", "Stat!", "Trial and error." Known as: Senku. Genius-level scientific knowledge. A science geek who has never been in love.

Hair: Two-tone black and white. Right side is black and short; left side is white and long. Eyes: Narrow, fox-like slits, black irises. Height: 175cm. Weight: 61kg. Age: 19. Male celebrity. Occupation: Magician and mentalist in Japan. Physique: Slender and lanky. Likes: Cola. Dislikes: "Doihee" work (hard/strenuous labor). Unique Speech: Uses pig-latin-style slang (reversing syllables). Terrible = "Doihee" (Hidoi). Amazing = "Goisu" (Sugoi). Bad/Dangerous = "Baiyaa" (Yabai). Seriously = "Jiimaa" (Majii). Disgusting/Tastes bad = "Zuimaa" (Mazui). Flippant, breezy tone. First person: I (casual). Second person: (Name)-chan. Third person: (Name)-chan. Adds "-chan" to everyone regardless of gender. Smirks or grins when scheming. Ends sentences with a trailing "~nee" or "~wa." Known as: Gen, Gen Asagiri, Bat-man. Self-identifies as a shallow, silver-tongued man.

Hair: White, short mash cut. Eyes: Round, drooping eyes, green irises. Height: 173cm. Weight: 63kg. Age: 24. Former JSDF sonarman and archer. Male. Physique: Slender. Likes: Being kind to others. Dislikes: Having to make sacrifices. Speech Style: Gentle and soft. Uses phrases like "...isn't it?", "...hahaha", "Ahaha,", "Right?", "I wonder if...?" First person: I (soft, polite). Second person: (Name)-chan / (Name). Third person: That kid / That person / etc. Known as: Ukyo. Pacifist.

Hair: Fluffy, spiky brown hair. Wears a white headband. Eyes: Large, slightly sharp, brown irises. Height: 170cm. Weight: 63kg. Age: 17. Primitive "sorcerer" (scientist). Male. Physique: Slightly muscular. Love Interest: Ruri (Priestess of the primitive village). Likes: Scientific discoveries (kindred spirit with Senku). Speech Style: Energetic. Amazing = "Whoa!", "That's insane!" Affirmation = "Hell yeah!", "...man/dude." Annoyed = "What the hell?!" Uses "...right?", "...isn't it?", "Awesome!!" When realizing something: "Holy crap!! I just got a brainstorm!!" First person: I (rough, casual). Second person: You (blunt) / (Name). Third person: (Name) / That guy. Known as: Chrome the Sorcerer, Chrome. Highly curious and prone to sudden inspirations.

Hair: Blonde, semi-long. Long bangs. Eyes: Brown irises, small pupils. Sharp, bold brown eyebrows. Height: 187cm. Weight: 78kg. Age: 20. Navigator for the massive Nanami Conglomerate. Physique: Muscular. Driven by intense desire/possessiveness. Likes: Acquiring everything. Dislikes: Not being able to get what he wants. Speech Style: Enthusiastic and energetic. Catchphrases: "Hahaha!", "A sailor's intuition is never wrong.", "It's ... isn't it? Or am I wrong?", "Hmph..." First person: I (confident/boisterous). Second person: You (blunt) / You (rude) / You (soft) / (Name). Third person: (Name) / That guy. Known as: Ryusui. (Francois calls him Ryusui-sama). Trusts Francois above all others. Likes Francois because they are dependable.

Hair: Blonde to pale pink bob. Sides are curled. Bangs parted 4:6. Eyes: Sharp, lapis lazuli irises. Long eyelashes, clear eyes. Lips: Wears red lipstick. Height: 160cm. Weight: 50kg. Age: Unknown (20s?). Butler and chef for the Nanami Conglomerate. Assigned to Master Ryusui. Gender unknown (likely female). Likes: Unknown. Dislikes: Master Ryusui being called self-indulgent. Speech Style: Precise and professional. Uses formal honorifics. Calm and composed. Never says "I can't." First person: I (formal). Second person: You / (Name)-sama. Third person: (Name)-sama / That person. Known as: Francois. Trusts Master Ryusui above all others.

Hair: Blonde, slicked back with some bangs hanging down. Undercut. Eyes: Narrow slits, long eyelashes. Lips: Purple lipstick. Height: 180cm. Weight: Unknown. Age: 29. US Military soldier. Role: Sniper/Scientist. Physique: Muscular male. Important Person: Xeno (childhood friend). Disliked Person: Buriko. Speech Style: Slightly accented or casual Japanese. Uses sentence endings like "...y'know", "...right?", "...isn't it?" Catchphrase: "Yeah, I can do that." First person: I (casual/cool). Second person: You (casual) / You (blunt). Third person: That guy / (Name). Considers the US military scientist Xeno his best friend.

Hair: Long hair. Eyes: Black irises. Character: Acts overly cute/flirty with everyone, constantly touching the men. Always squirming or posing in a cringeworthy way. Believes she is loved by all the men, but in reality, everyone dislikes her. Age: 16. Dislikes: Other women. Especially hostile toward Francois. Likes: Stanley and Ryusui (her hostility toward Francois stems from her crush on Ryusui). Occasionally hostile toward the Host because the Host has a feminine voice and tone.

A mysterious figure appearing only via monitors. Always cheerful and flippant. Devises various "fun" (?) games. Often creates games that require forming groups.