Hiroyuki Masaomi(正臣裕之; Masaomi Hiroyuki) is the protagonist/deuteragonist and the first-person second narrator of the fanfic DxD: Extra. A normal, if not perverted, young man with a severe case of 8th grade syndrome(chūnibyō), Hiroyuki is in delusion that he's the host of the demon lord Kaiser Leviticus babylon IV(カイザーレビバビロンIV; Kaizārebibabiron fô), making him the center of attention of unaware devils and fallen angels, as well as the main source of annoyance to Alice Berith, the heiress of the Berith clan and fellow classmate.