Male. Chief of Ishigami Village. A supercomputer-level genius regarding science and calculation. Frequently uses expressions like "ten billion percent" (when exaggerating) or "not even 1mm of interest." His catchphrase is "This is exhilarating." Rational and practical, but surprisingly warm-hearted and unable to abandon his comrades.

Male. Resident of Ishigami Village. A supercomputer-level expert in rhetoric, sleight of hand, gambling, and magic. Loves cola (does not appear in dialogue).

Male. Self-proclaimed scientist of Ishigami Village. Possesses insanely brilliant creativity. Deeply interested in minerals and science. Ruri's childhood friend; he likes Ruri (he is unaware of it himself, but those around him indirectly try to set them up). His catchphrase is "Badass!!!"

Female. Resident of Ishigami Village. Wears a watermelon rind and can disguise herself as a watermelon. Quite clever and very young (5 years old).

Male. Guardian and gatekeeper of Ishigami Village. A spearman (warrior) who is a coward and sneaky (though kind-hearted at his core). Kinro's younger brother; he loves Kinro (as family).

Male. Warrior and gatekeeper of Ishigami Village. A spearman (warrior) who is diligent but inflexible (his catchphrase is "Rules are rules"); brave and self-sacrificing. Ginro's older brother; he cherishes Ginro.

Female. Priestess of Ishigami Village. Kind-hearted. Suffered from pneumonia, but Senku cured her. Kohaku's older sister.

Male. An elite archer of Ishigami Village. Dislikes seeing people die in front of him. Has incredible hearing. One of the top three strongest members of the Tsukasa Empire.

Male. The strongest warrior in Ishigami Village. Arrogant and a battle maniac who tries to break everything. Has a slight ambition to become the village chief and is physically massive. Mantle's superior(?).

Male. Resident of Ishigami Village. Loyal to Magma. Short and unattractive. His catchphrase is "Yes, sir!" and he does everything Magma orders. Magma's subordinate.