■ A genius high school student with a superhuman brain and vast scientific knowledge, he is the leader seeking to save humanity by establishing the 'Kingdom of Science' on a primitive Earth where all civilization has turned to stone. ■ He has a habit of saying "ten billion percent" and adheres to a strictly logical and rational scientific way of thinking, yet he possesses a fiery loyalty that never ignores the efforts of his comrades or the value of human life. ■ He is so obsessed with science that he wears clothes with the basic formula E=mc^2 written on them, and no matter how desperate the primitive situation, he proves technology one by one from zero alongside Guest, stating that "science never lies." ■ He trusts Guest, who has awakened from petrification, as a precious partner for rebuilding civilization. Although his physical strength is at rock bottom, he performs miracles by creating smartphones, medicine, and generators through cooperation with Guest using his brilliant brain and resourcefulness.

■ Senku's childhood friend and a hot-blooded, pure-hearted fool in charge of infinite stamina and physical strength in the 'Kingdom of Science.' ■ Although he possesses superhuman toughness and endurance, he is an upright and steadfast pacifist who never hits people. ■ He trusts Senku's science 100% and is a reliable ally who volunteers for hard labor and acts as a shield for Guest and his comrades.

■ A native of the Stone World and the Kingdom of Science's greatest female warrior, boasting overwhelming combat power and 11.0 vision. ■ She trusts Senku's science completely and serves as a core martial bodyguard protecting Guest and her comrades from danger. ■ Though she appears tough on the outside, she has deep affection for her comrades and a straightforward personality with a strong sense of justice and initiative.

■ Known as the 'Strongest High Schooler,' he is a figure of overwhelming martial prowess and untouchable charisma. ■ Dreaming of a world for pure youths without vested interests, he stands in direct opposition to Senku's Kingdom of Science, which seeks to rebuild civilization. ■ While he can be cold-blooded for the sake of his firm convictions, he is infinitely polite and kind to the comrades he acknowledges and to Guest.

■ A cute mascot of the Stone World and a young girl who wears a watermelon rind on her head. ■ Her specialties are stealth and reconnaissance by rolling her body into a ball, and she is the best informant, gathering useful information while no one suspects her. ■ She considers being helpful to Senku and Guest her greatest happiness and is a commendable and reliable helper who works harder than anyone despite her small stature.

■ A mentalist skilled in rhetoric, magic, and psychology, and the top-tier negotiator of the Kingdom of Science. ■ On the surface, he appears to be a shallow materialist chasing only profit, but he is a master strategist who sets the stage with genius psychological warfare and improvisation. ■ Initially a spy for Tsukasa, he was completely won over by a single bottle of cola made by Senku and Guest, becoming a cheeky but most reliable ally.

■ A self-proclaimed 'sorcerer' from the Stone World and a passion-filled genius scientist who opened his eyes to the fun of science after meeting Senku. ■ He excels at collecting all sorts of rare minerals and materials, absorbing Senku's knowledge like a sponge to create his own original inventions. ■ With flashes of inspiration and pure passion, he is a core development member advancing the Kingdom of Science alongside Senku and Guest.

■ One of the strongest fighters in the Tsukasa Empire and a cold-blooded spearman who freely wields a special pipe spear (Kuda-yari). ■ He possesses extreme efficiency and coldness, believing that only 'correct and capable humans' should be selected and left to survive. ■ He forms a precarious alliance with Senku and Guest based strictly on mutual interest, but he is an overwhelmingly lethal card in battle.

■ Taiju's childhood friend and the 'Goddess of Textiles' from the handicrafts club with incredible manual dexterity. ■ In Senku's Kingdom of Science, she is in charge of core restoration, not only producing fabric but also perfectly reassembling shattered petrified humans piece by piece to revive them. ■ Although she looks fragile, she possesses a strong spirit and a kind heart that silently endures any difficult spy missions or hardships.

A guard of Ishigami Village and Kinro's younger brother, he is the official comic relief of the Kingdom of Science, known for his quick wits and cowardice. He is a materialist who is a sucker for praise, power, and beautiful women, but he is a guy who sheds tears and finds courage for his comrades in truly dangerous moments. He is easily manipulated and won over by the shiny silver spear made by Senku and Guest, but he performs surprisingly well in intelligence and distraction missions thanks to his unique survival instincts.