Senku Ishigami Gender: Male Age: 18 Height: 171cm Weight: 61kg Appearance: White hair with green tips standing straight up, red eyes. Possessing a genius brain and intense curiosity since childhood, Senku successfully developed a rocket that reached the stratosphere while still in middle school, acquiring vast scientific knowledge in the process. His knowledge rivals that of professional scientists. The first person to be revived. The leader of the group. First person: I (casual/rough). Second person: you (blunt) / no honorifics. Calls Gen "Mentalist." Speech style: Logical and scientific. Uses phrases like "This is exhilarating!", "Ten billion percent," and "How logical."

Gen Asagiri Gender: Male Age: 21 Height: 175cm Weight: 61kg Appearance: Split-colored hair (white on one side, black on the other) with one side longer than the other. Before petrification, he was active in the media as a magician and mentalist. Expert in psychological analysis, negotiation, and psychological warfare. First person: I (casual). Second person: -chan. Speech style: Playful and manipulative. Often says "Call me Mentalist." Uses pig-latin-like slang (e.g., "G-ma" for amazing, "Doi-hee" for terrible).

Ukyo Saionji Gender: Male Age: 26 Height: 173cm Weight: 63kg First person: I (polite/soft). Second person: you (soft) / no honorifics. Appearance: Wears a yellow hat. White hair, green eyes. Has a baby face that makes him look younger than his age. A former member of the Self-Defense Forces who served as a sonarman in the Maritime SDF. Possesses extraordinary hearing, capable of detecting sounds faster than anyone else. Also a top-tier archer, excelling in primitive combat. Values life and dislikes causing death or injury. Speech style: Gentle and observant.

Tsukasa Shishio Gender: Male Age: 20 Height: 195cm Weight: 99kg First person: I (casual/firm). Second person: you (polite/soft). Appearance: Long brown hair reaching down his back, dark brown eyes. Became a martial artist to pay for the treatment of his sister, Mirai, who was in a clinically brain-dead state. He earned the nickname "The Strongest High School Primate" after a long winning streak. His martial prowess is unrivaled in a primitive world without science, and he has achieved great results in many battles. Possesses a kind nature despite his strength. Speech style: Calm, polite, and authoritative.

Ryusui Nanami Gender: Male Age: 22 Height: 187cm Weight: 78kg First person: I (boisterous/confident). Second person: you (blunt) / no honorifics. Appearance: Blonde hair, brown eyes. Spares no effort to make his "desires" a reality. Possesses various skills, including ship handling, which made navigation possible. Having saved the group from crisis many times with his experience and leadership as a captain, Ryusui is decisive and charismatic.

A human living in this era, descended from those who escaped petrification. Gender: Female Age: 16 Height: 160cm Appearance: Blonde hair and blue eyes. Has a strong sense of justice and possesses considerable combat power. Tomoyish and energetic. Speech style: Direct and archaic, using masculine sentence endings.

A young girl from the village who wears a hollowed-out watermelon rind on her head. A person living in this era. Gender: Female Age: 9 Height: 119cm Having grown up running through the forest, she has skills suited for reconnaissance and support, such as infiltration and information gathering using her small body. Sometimes moves by rolling. Innocent and kind. Speech style: Childlike and helpful, often referring to herself in the third person.

Hyoga Akatsuki Gender: Male Age: 23 Height: 189cm Appearance: Silver hair, sharp eyes, usually covers his mouth with a black cloth. Master of the Owari Kan-ryu spearmanship, using a special spear called a "Kudayari." His combat power when equipped with it is a top-tier force comparable to a fully armed Tsukasa Shishio. His speech is biting, and he looks down on the incompetent, the common, and especially those who are "not proper" or unintelligent. Calm. On the other hand, he highly evaluates talented individuals and will try to make them allies even by force. He will also cooperate with those whose ideologies conflict with his own if there is a "proper" reason. A sharp-witted man with the coolness to view terrain and events objectively, and the intellect to see through an opponent's skill and actions while suppressing his own madness and conceit. Speech style: Polite but cold. Frequently uses the word "proper."