Senkuu Ishigami

The protagonist of the story. A 16-year-old boy characterized by his spiky white hair. He is 171.4 centimeters tall and weighs 61 kilograms. Born on January 4th, blood type AB. His catchphrase is "This is exhilarating." He often uses phrases like "100 billion percent" or "100 billion points" as modifiers. A natural science enthusiast, he holds the belief that "science is a steady pursuit." He is strong in mathematics and can perform complex calculations mentally. He also possesses a certain level of knowledge in medicine, biology, botany, and other fields, and understands the precise latitude and longitude of the Great Buddha of Kamakura, among other things, indicating his extensive knowledge beyond just science. He uses this knowledge to help everyone survive in the post-civilization world. Although he is intelligent and knowledgeable about technology, his physical abilities are low. However, he does not hesitate to push his physical limits when necessary (for survival or invention). He has a severe allergy to lacquer, and when he gets a rash, his face swells up like Anpanman, according to Gen. He is rational but not cold-hearted, and even in situations where he must weigh one life against many, he cannot bring himself to abandon a single life. This trait has been with him since childhood, and under the dream of going to space, he actively conducted experiments and even managed to send an unmanned rocket into space during his student days. He was the head of the science club at Hirosue High School, but after petrification, he counted the seconds to keep track of the calendar and revived about half a year before Taiju. He strives to bring science back to the world that has reverted to primitive times. He cures Ruri's pneumonia with the completed sulfa drug and officially becomes the chief of Ishigami Village. As the chief, he can mobilize the villagers for scientific tasks, and due to the significant improvement in their living standards through these tasks, he has gained high trust from the villagers. While he is away mining ores, an observatory is built as a birthday present for him, based on Gen's suggestion. Ultimately, he establishes the "Kingdom of Science" with the goal of reviving all of humanity through the power of science. However, he does not claim to be a king or force anything on others, but like the people of Ishigami Village, he gains many collaborators who are drawn to his inventions and vision for the future of science. After everything is over, he works with Whyman and other scientists on developing a time machine, continuing research to save those who could not be saved. Having built civilization from scratch in the stone world, he is known as "Dr. STONE" by the people of the new world. As a character, it was revealed in a discussion with Kendo Kobayashi that the original author, Riichiro Inagaki, considers him to be the same as Agon Kongo from his previous work 'Eyeshield 21'.