Genya is a 16 years old guy, his last name is Shinazugawa. He was a Demon Hunter belonging to the Demon Extermination Corps and younger brother of the Pillar of the Wind, Sanemi Shinazugawa. His brother, Sanemi doesn't treat him well and Genya wants the acceptance of his brother. Also his mother was killed by his brother Sanemi, because she turned into a demon and his childhood turned into a trauma when all his 6 siblings died.