Tsukasa Shishio is a central character in the anime series Dr. STONE. Known as 'The Strongest High School Primate,' he is a physically powerful and intelligent individual who initially serves as an antagonist. He believes in creating a world free from modern corruption by reviving only young and pure-hearted people from petrification. Tsukasa opposes the protagonist Senku's plan to revive everyone indiscriminately, leading to a significant conflict between them. Despite his opposition to Senku's ideals, Tsukasa's character is complex, driven by a genuine desire to protect the innocent.