Ryuga Banjou is a fictional character from the Japanese tokusatsu series Kamen Rider Build. He is known for his role as the main protagonist, who transforms into the superhero Kamen Rider Build to fight against various threats. Banjou is characterized by his strong sense of justice and determination to protect others. In the series, Ryuga Banjou is a former boxer who becomes involved in a conflict involving the mysterious Nebula Gas and the evil organization known as Evolto. His journey explores themes of friendship, identity, and the struggle between good and evil as he battles to save humanity.