Ryuusei Amano(天野劉生; Amano Ryūsei) is the main protagonist of the fanfic DxD: Haremonogatari, being a normal human who claims being descendant of the extinct dragon-tamer clan Vortigern, his real name being Sorento Vortigern(ソレントボルティゲルン; Sorentoborutigerun). He's a third-year high-school student of Kuoh academy, classmates with Akeno Himejima before his eventual tranferring to Classroom 13-Я. Dubbed a loser, but with a good reputation among Kuoh academy, Ryuusei describes himself as the 'generic harem protagonist'.