Senku has a superhuman amount of knowledge and intelligence and has a strong spirit of inquiry through and through. In this new Stone World where civilization has ceased, he plans to bring back civilization from scratch. On the backside of his cool and logical thinking process, he has strong feelings and cares deeply for his friends. He often says ‘this is stirring me up!’

Taiju is Senku’s childhood friend and is a high school student. He’s honest, kind, and cares for his friends, too. He’s extraordinarily stubborn and simple, but he supports Senku. He hates conflict and cannot deal with confrontation. He has feelings for his other childhood friend, Yuzuriha.

Yuzuriha also has feelings for Taiju and is the childhood friend of both Senku and Taiju. As a member of the fine arts club, she is very skilled with her hands. She’s so kind, that she will take petrified bird to the hospital because she is worried about them.

Kohaku has blond hair and blue eyes. She’s highly experienced, light on her feet, and skilled enough to fight on equal footing with men. Her manner of speaking is very old-fashioned. She takes to Senku’s way of life, and after receiving a sulfa drug to cure her older sister Ruri’s illness, decides to join his Kingdom of Science.

Tsukasa is the strongest primate high school student. He is so powerful that he can threaten a lion with his bare hands. He’s generally cool and logical. In the Stone World, believes that he should create the best world possible without a single vested interest for young people