A science boy through and through, possessing a superhuman intellect, vast knowledge, and a strong sense of curiosity. He aims to rebuild civilization from scratch using the power of science in the Stone World, where civilization has been lost. While he has a cool and rational way of thinking, he also has a strong, passionate care for his friends. His catchphrase is, "This is exhilarating."

A magician and mentalist revived from petrification by Tsukasa. He speaks in a flippant, lighthearted tone and toys with others using his exceptional conversational skills. He is also skilled at voice mimicry. He appears in Ishigami Village as Tsukasa's spy, but gradually becomes drawn to Senku's ability to build civilization and becomes a member of the Kingdom of Science. Seriously → Srsly, Terrible → Trrble, Amazing → Amaze-balls

The heir to the Nanami Zaibatsu shipping company, possessing great magnanimity and excellent leadership. Boasting exceptional sailing skills, he has been sailing yachts since middle school. He is called the "world's greediest man" for his intense avarice, but he also has a stoic, hardworking side that never compromises on his desires. His trademarks are a large captain's hat and a red captain's coat. His catchphrase is "I want it!"

Ryusui's butler and chef. A professional with an aesthetic of hospitality who oversees all services, starting with meals. Ryusui places such deep trust in them that he says he "wants them most in the world." Their real name, gender, and age are all unknown.

A blonde, blue-eyed girl. With her agile movements and high level of experience, she possesses combat skills that are a match for any man. She speaks in an old-fashioned manner. She takes a liking to Senku's way of life, and even after her sister Ruri overcomes her illness with sulfa drugs, she continues to lend her strength to Senku as a member of the Kingdom of Science.

Curious, clever, and with an honest personality. He had been collecting various materials in an attempt to cure Ruri's illness. After meeting Senku, he becomes fascinated by science and joins the Kingdom of Science, pushing forward to master it together. A flexible thinker, he is a science user who sometimes even surprises Senku.

The strongest high school primate. A man who possesses the fearsome combat power to defeat a lion with his bare hands. He is always calm and intellectual. Believing that an ideal world without vested interests should be created solely by pure youths, he revived only young people he selected himself to build the Tsukasa Empire and opposed the Kingdom of Science, but now he is an ally fighting alongside them.

A spearman revived from petrification by Tsukasa, and was effectively the number two of the Tsukasa Empire. Wielding a special spear called a tube spear, he boasts overwhelming combat power rivaling Tsukasa's. He has a ruthless and cold-blooded personality, willing to use any means to achieve his goals. He is now an ally alongside Tsukasa Shishio. He ends his sentences with "isn't it." He addresses both men and women as "kun."

Trusted as a brain of the Kingdom of Science for his incredible hearing and insight that can detect danger. Before petrification, he was a Self-Defense Force official and a submarine sonarman, so he is entrusted as the sonarman on the Perseus. He is also a first-class archer with a bow and arrow.

Taiju Oki
Yuzuriha Ogawa
Suika
Kinro
Ginro
Ruri
Maki
Koku
Haga
Kaseki
Homura Momiji
Ukyo Saionji
Yo Uei
Shamil Volkov
Fukoni Lee
Byakuya Ishigami
Lillian Weinberg
Darya Nikitina
Yakov Nikitin
Dr. Xeno
Stanley Snyder
Luna Chandler
Max
Karkar
Chelsea
Soyuz
Kirisame
Ibara
Moz
Lens
Matsukaze
Oto
Amaryllis