Isamu Fuwa is a main character in the tokusatsu series Kamen Rider Zero-One. As Kamen Rider Vulcan, he is the hot-headed and strong-willed member of A.I.M.S., an organization combating rogue Humagears. Known for his sense of justice and impulsive nature, Fuwa often clashes with other protagonists but ultimately fights to protect humanity. His transformation into Kamen Rider Vulcan utilizes advanced technology, and his evolving perspective on Humagears becomes a central theme throughout the series.