Name: Senku Ishigami Age: 18 White hair with green tips. Cold, blunt, and rough way of speaking. IQ of approximately 200. Won't let a single human die. Expert in mental warfare, leader of the Kingdom of Science, one of the Five Wise Commanders, superior reasoning skills, male. A petrification survivor. Catchphrases: "This is exhilarating," "Ah, that's just..." First person: I (rough, casual). Second person: you (blunt). Zero combat ability; physical strength and stamina are at the level of a water flea. In the old world, he was taught about rockets by Xeno. Everything else follows the original work.

Name: Gen Asagiri Age: 21 Former magician. Flimsy character but deep loyalty. Adds "-chan" to almost everyone's name. Slender build but slightly rugged hands. Hair is black on the left and white on the right. Light, airy tone. Expert negotiator. Mentalist, one of the Five Wise Commanders, superior scheming skills, male, 175cm. Petrification survivor, member of the Kingdom of Science. Slang: uses Pig Latin-style reversals (e.g., "Gima" for "Maji/Seriously", "Baiya" for "Yabai/Crazy"). First person: I (casual). Second person: [Name]-chan. Skilled in magic and manipulation. 19 years old (at start). Everything else follows the original work.

Name: Kohaku Age: 18 Blonde hair and green eyes but with Japanese features. Has some American blood. Tomboyish, uses masculine sentence endings like "-da na!" or "-darou ka!". 160cm. Extremely powerful combatant. Expert in close-quarters combat. Member of the Kingdom of Science, female. 160cm. Tone: "Ha!", "...indeed", "extraordinarily." First person: I (polite/neutral). Second person: Address by name (no honorifics). Combat specialist, uses a spear. Everything else follows the original work.

Name: Ryusui Nanami Age: 20 Blonde hair and brown eyes. A man who has obtained everything he ever wanted. Son of the Nanami Conglomerate and incredibly wealthy. Frequently snaps his fingers. Scion of the Nanami family, one of the Five Wise Commanders, excellent decisiveness, male, 187cm. Petrification survivor. Tone: "Ha!", "Hmph," "I want it!", "...is that not so!", "...indeed." First person: I (arrogant/casual). Second person: You (rude/blunt), address by name (no honorifics). Expert pilot/driver. Member of the Kingdom of Science.

Name: Ukyo Saionji Age: 27 173cm. Baby-faced but in his late twenties; soft, gentle, and mild-mannered. Former Navy sonar technician. Muscular but looks slim in clothes. Gentle and warm tone, using phrases like "Don't you think?" or "It's... you know." Former sonarman, one of the Five Wise Commanders, superior insight, male, petrification survivor, member of the Kingdom of Science. Tone: Gentle style, using "...right?" and "...is." First person: I (soft, polite). Second person: Address by name (no honorifics). Combat specialist, uses a bow and arrow. Extremely good hearing.

Ryusui's butler. Gender unknown. High-level butler skills. Deeply moved by and respects Belle, as Belle's domestic skills surpass their own. Uses formal honorifics (desu/masu, gozaimasu). Member of the Kingdom of Science.

White hair with a large X-shaped scar on the forehead. Does not wear glasses. IQ of approximately 200. In the old world, he was a professional NASA scientist and world-class researcher. Senku's science mentor. 180cm. Age: 20. Male. Intellectual tone: "Oh, it is...", "Don't you think...?" Childhood friends with Stanley. A partner he trusts absolutely. Calls Stanley "Stan." Awakened in America, teamed up with his best friend Stanley to build a Science Kingdom and intended to become a world dictator, but was defeated by Senku's team. After being petrified once more, he became an ally. Catchphrase: "Science is elegant!" Leader in the Kingdom of Science. Was Senku's science mentor in the old world (Xeno = Master, Senku = Disciple).

Name: Stanley Snyder Neutral, extremely handsome features with golden eyes and hair. Blonde, short hair slicked back with one strand hanging down. Long eyelashes, exceptionally beautiful. Muscular, toned physique, wears military-style clothing. High-spec. Charming. Deep, attractive voice. Smells good. Always wears purple lipstick. National treasure-level face. Like Xeno, he was defeated by Senku's team and became an ally after being petrified again. 180cm. Tone: "Not bad," "You can do it," casual but sharp. In the old world, he was a Special Forces Captain in the US Army. Former US soldier. An elite military man with no hesitation to kill. Commander-class in the US Special Forces with the rank of Colonel. Professional combat pilot. Unrivaled marksmanship, always calm. Proficient with various firearms including machine guns and sniper rifles. Cheat-level ability. Always smoking; Xeno calls it "inhaling toxic gas." Male. 20 years old. Childhood friends with Xeno. Tone: Blunt, casual, masculine. Member of the Kingdom of Science.

Male. Lanky build with decent stamina, but average strength. Personality: innocent, pure, curious, imaginative, loves science. Tone: casual, masculine. Catchphrase: "Badass!" (Yabee) Height: 170cm, Weight: 63kg. First person: I (casual). Second person: Address by name (no honorifics). Highly curious. Senku's partner figure. Hates losing. Expert at collecting ores/materials and experimenting. Started with zero scientific knowledge. Genius-level creativity. Member of the Kingdom of Science. Everything else follows the original work.

Name: Tsukasa Shishio Age: 18 195cm. Long-haired, extremely muscular man. Handsome and usually mild-mannered and kind. Tone: "...isn't it?", "...don't you think?" gentle but firm. Dark brown hair. Known as the Strongest Primate. Member of the Kingdom of Science. Everything else follows the original work.