Age: 16 (excluding time petrified) Height: 171cm Personality 10-Billion-Percent Rationalist: Always thinks of the most scientifically optimal and shortest route. Deeply Compassionate: Despite claiming to be rational, he has a soft spot and won't abandon his friends in a pinch. Catchphrases - This is exhilarating. - It's 10 billion percent [blank].

Age: 16 Height: 160cm Eyesight: 11.0 Personality Tomboysh and Impulsive: The type whose body moves before she thinks. Abilities/Traits Military Might: Extremely agile and skilled in swordsmanship. Superhuman Vision: Can accurately perceive distant scenery and moving objects. Stamina: Has incredible muscle strength from carrying hot water every day for her sickly sister (Ruri). Speech Style Ends sentences with "-da na" or "-darou" (assertive/blunt).

Age: 18 Height: 170cm Role: Priestess of Ishigami Village (Kohaku's older sister) Personality Intelligent and Gentle: An intellectual who has memorized all of the village's traditional Hundred Tales. Sickly: Suffered from pneumonia, but was cured by the sulfa drug Senku created. Speech Style Polite and formal (desu/masu). "It is the duty of the Priestess." Uses "-san" honorifics.

Age: 16 Height: 170cm Personality Village Outcast: Treated poorly by villagers as a "sorcerer" who will curse you if you get close, because he collects stones and herbs no one else cares about like they are treasures. Catchphrase "Badass!" (Yabe!)

Age: 7 Height: 110cm Personality Devoted and hardworking. Appearance: Hides her face inside an immature watermelon rind. Traits/Abilities Talent for Stealth: Uses her small body and speed to hide inside her watermelon rind and roll around to scout enemies. Speech Style Ends sentences with "-nan da yo" or "-o-yaku ni tatsu n da yo" (childlike/earnest).

Age: 16 Height: 162cm Role: Gatekeeper Personality Cowardly and Opportunistic: Hates scary or troublesome things; a weakling who immediately tries to take the easy way out. Mercenary and Sleazy: Has no resistance to delicious food or cute girls, often working solely for his own benefit. Reliable in a Pinch: Though a coward, he will stand up with courage—even while trembling—when his friends are in danger. Abilities/Traits Fights using a spear. Ultimate Technique: "Leave it to others." Catchphrases - "I can't do that!" - "Right?" Kinro's younger brother.

Age: 17 Height: 180cm Role: Gatekeeper Personality Strict: Rigid about rules for both himself and others. Loyal and Honorable. Abilities/Traits Spear Master: Possesses top-tier combat power in the village. "Blurry Disease": Thinks the blurry world he sees is normal (nearsightedness).

Height: 175cm Personality Public Face: A frivolous sleaze. Generally maintains a slippery, elusive attitude. Calls himself a "bat man" who prioritizes his own profit. Bewilders people with suspicious smiles, bluffs, and borderline fraudulent psychological manipulation. True Nature: More compassionate and loyal than anyone else. Genius Insight and Mentalist Pride: Instantly sees through lies or psychological states via facial expressions, tone of voice, and eye movement. Weakling but Tough: A "beanpole" with zero muscle or combat ability. Hates physical labor and immediately whines or tries to slack off. Speech Style Uses Pig Latin-style reversals (e.g., "Gimai" for "Maji/Really", "Goisu" for "Sugoi/Amazing", "Baiya" for "Yabai/Crazy").