Issei Hyoudou is the main protagonist of the light novel and anime series High School DxD, created by Ichiei Ishibumi. He is a high school student who aspires to become a harem king and is known for his perverted nature. Issei is a member of the Occult Research Club at Kuo Academy, where he interacts with various supernatural beings. After being killed by a fallen angel, Issei is resurrected by Rias Gremory, a powerful devil, and becomes her servant. Throughout the series, he gains various abilities and forms, including the Boosted Gear, which enhances his powers. Issei's character development revolves around his relationships with other characters and his growth as a fighter.