Sento Kiryu

Sento Kiryu (桐生 戦兎 Kiryū Sento) is the main protagonist and narrator of Kamen Rider Build. He is a 26-year-old genius theoretical physicist who experiments with Fullbottles to further enhance his abilities as Kamen Rider Build (仮面ライダービルド Kamen Raidā Birudo) to fight against the evil Smash organisms. A man with no memory of his past, he was initially believed to be someone named Taro Satou (佐藤 太郎 Satō Tarō), but his true identity turned out to be someone else. Since the war for the Pandora Box broke out between the three countries, Sento accepted reality for what it was in order to end the war that his previous identity had started. Since the opening of Pandora Box and the resurfacing of his memories, he banded with his former enemies and fought against a common enemy who threatened to destroy Earth.