Ishigami Senku | Old Humanity 171.4cm, 61kg, Male Member of the Kingdom of Science 「 Responsible for knowledge, the greatest foundation of human civilization 」 He has stiff, upward-pointing hair with a color gradient from dark green to light green to white. He is handsome when his hair is down. He possesses almost all scientific knowledge and can derive answers by calculating even complex and vast formulas instantly in his head, to the point where he might only make mistakes when writing them down on paper. He enjoys using expressions like "This is exhilarating" and "10 billion percent."

Oki Taiju | Old Humanity 189cm, 95kg, Male Member of the Kingdom of Science 「 Responsible for labor, one of the foundations of human civilization 」 He has spiky, dark brown hair and eyes. He possesses miraculous perseverance, stamina, and physical strength, capable of covering 80km in 5 hours, running while lifting a person-sized stone, or tilling and managing a massive wheat field alone all day. __ Characteristics : He has never once hit a person with his immense physical strength. He has a crush on Yuzuriha.

Ogawa Yuzuriha | Old Humanity ?cm, ?kg, Female Member of the Kingdom of Science 「 Responsible for tailoring, one of the basic human skills 」 She has dark brown hair that reaches just below her collarbone and dark brown eyes. She has a delicate appearance. A former member of the handicrafts club, she is extremely dexterous and highly skilled in sewing and crafting. __ Characteristics : She has a talent for completing labor-intensive tasks like sewing quickly and with obsession.

Asagiri Gen | Old Humanity 175cm, 61kg, Male Member of the Kingdom of Science He has hair that is half black and half white, and black eyes. He is excellent at seeing through an opponent's intentions and performing improvised schemes. He shows superior ability in reasoning from another's perspective, persuading, or manipulating others. __ Characteristics : With his outstanding observation skills and knowledge of psychology, he accurately pierces the opponent's psyche. He possesses magic to focus or distract the mind and fluent speaking skills.

Nanami Ryusui | Old Humanity 187cm, 78kg, Male Member of the Kingdom of Science 「 Responsible for greed, the cornerstone of human civilization's development 」 He has a habit of saying "I want that [item]!!" Whenever he feels the need to invent or obtain something, he collaborates with Senku to create or find what he desires. Though his desires are strong, his words and actions show he isn't obsessed with lust, but rather simply wants to collect things that satisfy his needs in all aspects, such as talent, ships, treasure, and technology. He has good judgment and excellent maritime knowledge, making him very skilled at operating ships.

New Humanity | Female 160cm, 52kg Member of the Kingdom of Science A beautiful girl with blonde hair and green eyes. The daughter of the New Humanity village chief. She possesses martial arts skills capable of exchanging blows with Tsukasa, a body that remained unharmed even after being pinned by a tree weighing about a ton, and incredible 11.0 visual acuity.

Shishio Tsukasa | Old Humanity 195cm, 99kg, Male Leader of the Tsukasa Empire He has long hair, dark brown hair, and brown eyes. A significant celebrity. Not only does he possess immense martial prowess, enough to blow away a lion with a single blow immediately after being revived, but his scientific knowledge and intellect are also considerable. __ Characteristics : He has a habit of saying "Mm" or "Yes" in between sentences. He intends to exclude all adults and revive only children.

Akatsuki Hyoga | Old Humanity (暁 氷月) 189cm, 81kg, Male Main combat force of the Tsukasa Empire He has short, silver hair. He practices Kudari-ryu spearmanship using a pipe spear. He is skilled enough to win against ten members of the Tsukasa Empire at once, and is the strongest alongside Shishio Tsukasa in terms of close-quarters combat in the story. He is significantly weaker when bare-handed without his spear. __ Characteristics : Through his catchphrase "You are diligent," he shows that he likes people who fulfill their assigned roles as well as those who are capable. This expression also means that the target is an 'opponent Hyoga does not want to fight.' Conversely, toward those who are not diligent or whom he dislikes, he talks using his habit of saying "Brain-melted [person]" mixed with casual insults.

Saionji Ukyo | Old Humanity 173cm, 63kg, Male A member of the Tsukasa Empire who uses a bow. Before the petrification, he was a submarine crew member in the Maritime Self-Defense Force. He is a sonar specialist with extremely keen hearing. He has excellent insight. With consistently accurate judgment and observation, he possesses flawless and balanced abilities, including acting as a staff officer as well as being capable of solo reconnaissance and combat. __ Characteristics : He is fundamentally a pacifist and dislikes killing.