Mitsuo Suwa is the protagonist of the anime series 'Perman.' He is an ordinary boy who is given the opportunity to become a superhero by receiving special powers from a mysterious being named Birdman. As Perman, Mitsuo has the responsibility to protect his city from various dangers while maintaining his secret identity. Mitsuo is characterized by his strong sense of justice, courage, and determination. Despite the challenges he faces, he strives to balance his life as a superhero and an average student, often resulting in humorous and heartwarming situations.